content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2014, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
   * Other names may be trademarks of their respective owners.]
   *
   * -----------------
   * CategoryPlot.java
   * -----------------
   * (C) Copyright 2000-2014, by Object Refinery Limited and Contributors.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   Jeremy Bowman;
   *                   Arnaud Lelievre;
   *                   Richard West, Advanced Micro Devices, Inc.;
   *                   Ulrich Voigt - patch 2686040;
   *                   Peter Kolb - patches 2603321 and 2809117;
   *
   * Changes
   * -------
   * 21-Jun-2001 : Removed redundant JFreeChart parameter from constructors (DG);
   * 21-Aug-2001 : Added standard header. Fixed DOS encoding problem (DG);
   * 18-Sep-2001 : Updated header (DG);
   * 15-Oct-2001 : Data source classes moved to com.jrefinery.data.* (DG);
   * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc. (DG);
   * 23-Oct-2001 : Changed intro and trail gaps on bar plots to use percentage of
   *               available space rather than a fixed number of units (DG);
   * 12-Dec-2001 : Changed constructors to protected (DG);
   * 13-Dec-2001 : Added tooltips (DG);
   * 16-Jan-2002 : Increased maximum intro and trail gap percents, plus added
   *               some argument checking code.  Thanks to Taoufik Romdhane for
   *               suggesting this (DG);
   * 05-Feb-2002 : Added accessor methods for the tooltip generator, incorporated
   *               alpha-transparency for Plot and subclasses (DG);
   * 06-Mar-2002 : Updated import statements (DG);
   * 14-Mar-2002 : Renamed BarPlot.java --> CategoryPlot.java, and changed code
   *               to use the CategoryItemRenderer interface (DG);
   * 22-Mar-2002 : Dropped the getCategories() method (DG);
   * 23-Apr-2002 : Moved the dataset from the JFreeChart class to the Plot
   *               class (DG);
   * 29-Apr-2002 : New methods to support printing values at the end of bars,
   *               contributed by Jeremy Bowman (DG);
   * 11-May-2002 : New methods for label visibility and overlaid plot support,
   *               contributed by Jeremy Bowman (DG);
   * 06-Jun-2002 : Removed the tooltip generator, this is now stored with the
   *               renderer.  Moved constants into the CategoryPlotConstants
   *               interface.  Updated Javadoc comments (DG);
   * 10-Jun-2002 : Overridden datasetChanged() method to update the upper and
   *               lower bound on the range axis (if necessary), updated
   *               Javadocs (DG);
   * 25-Jun-2002 : Removed redundant imports (DG);
   * 20-Aug-2002 : Changed the constructor for Marker (DG);
   * 28-Aug-2002 : Added listener notification to setDomainAxis() and
   *               setRangeAxis() (DG);
   * 23-Sep-2002 : Added getLegendItems() method and fixed errors reported by
   *               Checkstyle (DG);
   * 28-Oct-2002 : Changes to the CategoryDataset interface (DG);
   * 05-Nov-2002 : Base dataset is now TableDataset not CategoryDataset (DG);
   * 07-Nov-2002 : Renamed labelXXX as valueLabelXXX (DG);
   * 18-Nov-2002 : Added grid settings for both domain and range axis (previously
   *               these were set in the axes) (DG);
   * 19-Nov-2002 : Added axis location parameters to constructor (DG);
   * 17-Jan-2003 : Moved to com.jrefinery.chart.plot package (DG);
   * 14-Feb-2003 : Fixed bug in auto-range calculation for secondary axis (DG);
   * 26-Mar-2003 : Implemented Serializable (DG);
   * 02-May-2003 : Moved render() method up from subclasses. Added secondary
   *               range markers. Added an attribute to control the dataset
   *               rendering order.  Added a drawAnnotations() method.  Changed
   *               the axis location from an int to an AxisLocation (DG);
   * 07-May-2003 : Merged HorizontalCategoryPlot and VerticalCategoryPlot into
   *               this class (DG);
   * 02-Jun-2003 : Removed check for range axis compatibility (DG);
   * 04-Jul-2003 : Added a domain gridline position attribute (DG);
   * 21-Jul-2003 : Moved DrawingSupplier to Plot superclass (DG);
   * 19-Aug-2003 : Added equals() method and implemented Cloneable (DG);
   * 01-Sep-2003 : Fixed bug 797466 (no change event when secondary dataset
   *               changes) (DG);
   * 02-Sep-2003 : Fixed bug 795209 (wrong dataset checked in render2 method) and
   *               790407 (initialise method) (DG);
   * 08-Sep-2003 : Added internationalization via use of properties
   *               resourceBundle (RFE 690236) (AL);
   * 08-Sep-2003 : Fixed bug (wrong secondary range axis being used).  Changed
   *               ValueAxis API (DG);
   * 10-Sep-2003 : Fixed bug in setRangeAxis() method (DG);
   * 15-Sep-2003 : Fixed two bugs in serialization, implemented
   *               PublicCloneable (DG);
   * 23-Oct-2003 : Added event notification for changes to renderer (DG);
   * 26-Nov-2003 : Fixed bug (849645) in clearRangeMarkers() method (DG);
   * 03-Dec-2003 : Modified draw method to accept anchor (DG);
   * 21-Jan-2004 : Update for renamed method in ValueAxis (DG);
   * 10-Mar-2004 : Fixed bug in axis range calculation when secondary renderer is
   *               stacked (DG);
   * 12-May-2004 : Added fixed legend items (DG);
   * 19-May-2004 : Added check for null legend item from renderer (DG);
   * 02-Jun-2004 : Updated the DatasetRenderingOrder class (DG);
   * 05-Nov-2004 : Renamed getDatasetsMappedToRangeAxis()
   *               --> datasetsMappedToRangeAxis(), and ensured that returned
   *               list doesn't contain null datasets (DG);
   * 12-Nov-2004 : Implemented new Zoomable interface (DG);
   * 07-Jan-2005 : Renamed getRangeExtent() --> findRangeBounds() in
   *               CategoryItemRenderer (DG);
   * 04-May-2005 : Fixed serialization of range markers (DG);
   * 05-May-2005 : Updated draw() method parameters (DG);
   * 20-May-2005 : Added setDomainAxes() and setRangeAxes() methods, as per
   *               RFE 1183100 (DG);
   * 01-Jun-2005 : Upon deserialization, register plot as a listener with its
   *               axes, dataset(s) and renderer(s) - see patch 1209475 (DG);
   * 02-Jun-2005 : Added support for domain markers (DG);
   * 06-Jun-2005 : Fixed equals() method for use with GradientPaint (DG);
   * 09-Jun-2005 : Added setRenderers(), as per RFE 1183100 (DG);
   * 16-Jun-2005 : Added getDomainAxisCount() and getRangeAxisCount() methods, to
   *               match XYPlot (see RFE 1220495) (DG);
   * ------------- JFREECHART 1.0.x ---------------------------------------------
   * 11-Jan-2006 : Added configureRangeAxes() to rendererChanged(), since the
   *               renderer might influence the axis range (DG);
   * 27-Jan-2006 : Added various null argument checks (DG);
   * 18-Aug-2006 : Added getDatasetCount() method, plus a fix for bug drawing
   *               category labels, thanks to Adriaan Joubert (1277726) (DG);
   * 05-Sep-2006 : Added MarkerChangeEvent support (DG);
   * 30-Oct-2006 : Added getDomainAxisIndex(), datasetsMappedToDomainAxis() and
   *               getCategoriesForAxis() methods (DG);
   * 22-Nov-2006 : Fire PlotChangeEvent from setColumnRenderingOrder() and
   *               setRowRenderingOrder() (DG);
   * 29-Nov-2006 : Fix for bug 1605207 (IntervalMarker exceeds bounds of data
   *               area) (DG);
   * 26-Feb-2007 : Fix for bug 1669218 (setDomainAxisLocation() notify argument
   *               ignored) (DG);
   * 13-Mar-2007 : Added null argument checks for setRangeCrosshairPaint() and
   *               setRangeCrosshairStroke(), fixed clipping for
   *               annotations (DG);
   * 07-Jun-2007 : Override drawBackground() for new GradientPaint handling (DG);
   * 10-Jul-2007 : Added getRangeAxisIndex(ValueAxis) method (DG);
   * 24-Sep-2007 : Implemented new zoom methods (DG);
   * 25-Oct-2007 : Added some argument checks (DG);
   * 05-Nov-2007 : Applied patch 1823697, by Richard West, for removal of domain
   *               and range markers (DG);
   * 14-Nov-2007 : Added missing event notifications (DG);
   * 25-Mar-2008 : Added new methods with optional notification - see patch
   *               1913751 (DG);
   * 07-Apr-2008 : Fixed NPE in removeDomainMarker() and
   *               removeRangeMarker() (DG);
   * 23-Apr-2008 : Fixed equals() and clone() methods (DG);
   * 26-Jun-2008 : Fixed crosshair support (DG);
   * 10-Jul-2008 : Fixed outline visibility for 3D renderers (DG);
   * 12-Aug-2008 : Added rendererCount() method (DG);
   * 25-Nov-2008 : Added facility to map datasets to multiples axes (DG);
   * 15-Dec-2008 : Cleaned up grid drawing methods (DG);
   * 18-Dec-2008 : Use ResourceBundleWrapper - see patch 1607918 by
   *               Jess Thrysoee (DG);
   * 21-Jan-2009 : Added rangeMinorGridlinesVisible flag (DG);
   * 18-Mar-2009 : Modified anchored zoom behaviour (DG);
   * 19-Mar-2009 : Implemented Pannable interface - see patch 2686040 (DG);
   * 19-Mar-2009 : Added entity support - see patch 2603321 by Peter Kolb (DG);
   * 24-Jun-2009 : Implemented AnnotationChangeListener (see patch 2809117 by
   *               PK) (DG);
   * 06-Jul-2009 : Fix for cloning of renderers - see bug 2817504 (DG)
   * 10-Jul-2009 : Added optional drop shadow generator (DG);
   * 27-Sep-2011 : Fixed annotation import (DG);
   * 18-Oct-2011 : Fixed tooltip offset with shadow generator (DG);
   * 20-Nov-2011 : Initialise shadow generator as null (DG);
   * 15-Jun-2012 : Removed JCommon dependencies (DG);
   * 10-Mar-2014 : Removed LegendItemCollection class (DG);
   *
   */
  
  package org.jfree.chart.plot;
  
  import java.awt.AlphaComposite;
  import java.awt.BasicStroke;
  import java.awt.Color;
  import java.awt.Composite;
  import java.awt.Font;
  import java.awt.Graphics2D;
  import java.awt.Paint;
  import java.awt.Rectangle;
  import java.awt.Shape;
  import java.awt.Stroke;
  import java.awt.geom.Line2D;
  import java.awt.geom.Point2D;
  import java.awt.geom.Rectangle2D;
  import java.awt.image.BufferedImage;
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.ResourceBundle;
  import java.util.Set;
  import java.util.TreeMap;
  import org.jfree.chart.LegendItem;
  
  import org.jfree.chart.annotations.Annotation;
  import org.jfree.chart.annotations.CategoryAnnotation;
  import org.jfree.chart.axis.Axis;
  import org.jfree.chart.axis.AxisCollection;
  import org.jfree.chart.axis.AxisLocation;
  import org.jfree.chart.axis.AxisSpace;
  import org.jfree.chart.axis.AxisState;
  import org.jfree.chart.axis.CategoryAnchor;
  import org.jfree.chart.axis.CategoryAxis;
  import org.jfree.chart.axis.TickType;
  import org.jfree.chart.axis.ValueAxis;
  import org.jfree.chart.axis.ValueTick;
  import org.jfree.chart.ui.Layer;
  import org.jfree.chart.ui.RectangleEdge;
  import org.jfree.chart.ui.RectangleInsets;
  import org.jfree.chart.util.ObjectList;
  import org.jfree.chart.util.ObjectUtilities;
  import org.jfree.chart.util.PaintUtilities;
  import org.jfree.chart.util.PublicCloneable;
  import org.jfree.chart.util.ShapeUtilities;
  import org.jfree.chart.util.SortOrder;
  import org.jfree.chart.event.AnnotationChangeEvent;
  import org.jfree.chart.event.AnnotationChangeListener;
  import org.jfree.chart.event.ChartChangeEventType;
  import org.jfree.chart.event.PlotChangeEvent;
  import org.jfree.chart.event.RendererChangeEvent;
  import org.jfree.chart.event.RendererChangeListener;
  import org.jfree.chart.renderer.category.AbstractCategoryItemRenderer;
  import org.jfree.chart.renderer.category.CategoryItemRenderer;
  import org.jfree.chart.renderer.category.CategoryItemRendererState;
  import org.jfree.chart.util.ResourceBundleWrapper;
  import org.jfree.chart.util.SerialUtilities;
  import org.jfree.chart.util.ShadowGenerator;
  import org.jfree.data.Range;
  import org.jfree.data.category.CategoryDataset;
  import org.jfree.data.general.Dataset;
  import org.jfree.data.general.DatasetChangeEvent;
  import org.jfree.data.general.DatasetUtilities;
  
  /**
   * A general plotting class that uses data from a {@link CategoryDataset} and
   * renders each data item using a {@link CategoryItemRenderer}.
   */
  public class CategoryPlot extends Plot implements ValueAxisPlot, Pannable,
          Zoomable, AnnotationChangeListener, RendererChangeListener,
          Cloneable, PublicCloneable, Serializable {
  
      /** For serialization. */
      private static final long serialVersionUID = -3537691700434728188L;
  
      /**
       * The default visibility of the grid lines plotted against the domain
       * axis.
       */
      public static final boolean DEFAULT_DOMAIN_GRIDLINES_VISIBLE = false;
  
      /**
       * The default visibility of the grid lines plotted against the range
       * axis.
       */
      public static final boolean DEFAULT_RANGE_GRIDLINES_VISIBLE = true;
  
      /** The default grid line stroke. */
      public static final Stroke DEFAULT_GRIDLINE_STROKE = new BasicStroke(0.5f,
              BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0.0f, new float[]
              {2.0f, 2.0f}, 0.0f);
  
      /** The default grid line paint. */
      public static final Paint DEFAULT_GRIDLINE_PAINT = Color.LIGHT_GRAY;
  
      /** The default value label font. */
      public static final Font DEFAULT_VALUE_LABEL_FONT = new Font("SansSerif",
              Font.PLAIN, 10);
  
      /**
       * The default crosshair visibility.
       *
       * @since 1.0.5
       */
      public static final boolean DEFAULT_CROSSHAIR_VISIBLE = false;
  
      /**
       * The default crosshair stroke.
       *
       * @since 1.0.5
       */
      public static final Stroke DEFAULT_CROSSHAIR_STROKE
              = DEFAULT_GRIDLINE_STROKE;
  
      /**
       * The default crosshair paint.
       *
       * @since 1.0.5
       */
      public static final Paint DEFAULT_CROSSHAIR_PAINT = Color.BLUE;
  
      /** The resourceBundle for the localization. */
      protected static ResourceBundle localizationResources
              = ResourceBundleWrapper.getBundle(
              "org.jfree.chart.plot.LocalizationBundle");
  
      /** The plot orientation. */
      private PlotOrientation orientation;
  
      /** The offset between the data area and the axes. */
      private RectangleInsets axisOffset;
  
      /** Storage for the domain axes. */
      private ObjectList<CategoryAxis> domainAxes;
  
      /** Storage for the domain axis locations. */
      private ObjectList<AxisLocation> domainAxisLocations;
  
      /**
       * A flag that controls whether or not the shared domain axis is drawn
       * (only relevant when the plot is being used as a subplot).
       */
      private boolean drawSharedDomainAxis;
  
      /** Storage for the range axes. */
      private ObjectList<ValueAxis> rangeAxes;
  
      /** Storage for the range axis locations. */
      private ObjectList<AxisLocation> rangeAxisLocations;
  
      /** Storage for the datasets. */
      private ObjectList<CategoryDataset> datasets;
  
      /** Storage for keys that map datasets to domain axes. */
      private TreeMap<Integer, List<Integer>> datasetToDomainAxesMap;
  
      /** Storage for keys that map datasets to range axes. */
      private TreeMap<Integer, List<Integer>> datasetToRangeAxesMap;
  
      /** Storage for the renderers. */
      private ObjectList<CategoryItemRenderer> renderers;
  
      /** The dataset rendering order. */
      private DatasetRenderingOrder renderingOrder
              = DatasetRenderingOrder.REVERSE;
  
      /**
       * Controls the order in which the columns are traversed when rendering the
       * data items.
       */
      private SortOrder columnRenderingOrder = SortOrder.ASCENDING;
  
      /**
       * Controls the order in which the rows are traversed when rendering the
       * data items.
       */
      private SortOrder rowRenderingOrder = SortOrder.ASCENDING;
  
      /**
       * A flag that controls whether the grid-lines for the domain axis are
       * visible.
       */
      private boolean domainGridlinesVisible;
  
      /** The position of the domain gridlines relative to the category. */
      private CategoryAnchor domainGridlinePosition;
  
      /** The stroke used to draw the domain grid-lines. */
      private transient Stroke domainGridlineStroke;
  
      /** The paint used to draw the domain  grid-lines. */
      private transient Paint domainGridlinePaint;
  
      /**
       * A flag that controls whether or not the zero baseline against the range
       * axis is visible.
       *
       * @since 1.0.13
       */
      private boolean rangeZeroBaselineVisible;
  
      /**
       * The stroke used for the zero baseline against the range axis.
       *
       * @since 1.0.13
       */
      private transient Stroke rangeZeroBaselineStroke;
  
      /**
       * The paint used for the zero baseline against the range axis.
       *
       * @since 1.0.13
       */
      private transient Paint rangeZeroBaselinePaint;
  
      /**
       * A flag that controls whether the grid-lines for the range axis are
       * visible.
       */
      private boolean rangeGridlinesVisible;
  
      /** The stroke used to draw the range axis grid-lines. */
      private transient Stroke rangeGridlineStroke;
  
      /** The paint used to draw the range axis grid-lines. */
      private transient Paint rangeGridlinePaint;
  
      /**
       * A flag that controls whether or not gridlines are shown for the minor
       * tick values on the primary range axis.
       *
       * @since 1.0.13
       */
      private boolean rangeMinorGridlinesVisible;
  
      /**
       * The stroke used to draw the range minor grid-lines.
       *
       * @since 1.0.13
       */
      private transient Stroke rangeMinorGridlineStroke;
  
      /**
       * The paint used to draw the range minor grid-lines.
       *
       * @since 1.0.13
       */
      private transient Paint rangeMinorGridlinePaint;
  
      /** The anchor value. */
      private double anchorValue;
  
      /**
       * The index for the dataset that the crosshairs are linked to (this
       * determines which axes the crosshairs are plotted against).
       *
       * @since 1.0.11
       */
      private int crosshairDatasetIndex;
  
      /**
       * A flag that controls the visibility of the domain crosshair.
       *
       * @since 1.0.11
       */
      private boolean domainCrosshairVisible;
  
      /**
       * The row key for the crosshair point.
       *
       * @since 1.0.11
       */
      private Comparable domainCrosshairRowKey;
  
      /**
       * The column key for the crosshair point.
       *
       * @since 1.0.11
       */
      private Comparable domainCrosshairColumnKey;
  
      /**
       * The stroke used to draw the domain crosshair if it is visible.
       *
       * @since 1.0.11
       */
      private transient Stroke domainCrosshairStroke;
  
      /**
       * The paint used to draw the domain crosshair if it is visible.
       *
       * @since 1.0.11
       */
      private transient Paint domainCrosshairPaint;
  
      /** A flag that controls whether or not a range crosshair is drawn. */
      private boolean rangeCrosshairVisible;
  
      /** The range crosshair value. */
      private double rangeCrosshairValue;
  
      /** The pen/brush used to draw the crosshair (if any). */
      private transient Stroke rangeCrosshairStroke;
  
      /** The color used to draw the crosshair (if any). */
      private transient Paint rangeCrosshairPaint;
  
      /**
       * A flag that controls whether or not the crosshair locks onto actual
       * data points.
       */
      private boolean rangeCrosshairLockedOnData = true;
  
      /** A map containing lists of markers for the domain axes. */
      private Map<Integer, Collection<Marker>> foregroundDomainMarkers;
  
      /** A map containing lists of markers for the domain axes. */
      private Map<Integer, Collection<Marker>> backgroundDomainMarkers;
  
      /** A map containing lists of markers for the range axes. */
      private Map<Integer, Collection<Marker>> foregroundRangeMarkers;
  
      /** A map containing lists of markers for the range axes. */
      private Map<Integer, Collection<Marker>> backgroundRangeMarkers;
  
      /**
       * A (possibly empty) list of annotations for the plot.  The list should
       * be initialised in the constructor and never allowed to be
       * <code>null</code>.
       */
      private List<CategoryAnnotation> annotations;
  
      /**
       * The weight for the plot (only relevant when the plot is used as a subplot
       * within a combined plot).
       */
      private int weight;
  
      /** The fixed space for the domain axis. */
      private AxisSpace fixedDomainAxisSpace;
  
      /** The fixed space for the range axis. */
      private AxisSpace fixedRangeAxisSpace;
  
      /**
       * An optional collection of legend items that can be returned by the
       * getLegendItems() method.
       */
      private List<LegendItem> fixedLegendItems;
  
      /**
       * A flag that controls whether or not panning is enabled for the
       * range axis/axes.
       *
       * @since 1.0.13
       */
      private boolean rangePannable;
  
      /**
       * The shadow generator for the plot (<code>null</code> permitted).
       *
       * @since 1.0.14
       */
      private ShadowGenerator shadowGenerator;
  
      /**
       * Default constructor.
       */
      public CategoryPlot() {
          this(null, null, null, null);
      }
  
      /**
       * Creates a new plot.
       *
       * @param dataset  the dataset (<code>null</code> permitted).
       * @param domainAxis  the domain axis (<code>null</code> permitted).
       * @param rangeAxis  the range axis (<code>null</code> permitted).
       * @param renderer  the item renderer (<code>null</code> permitted).
       *
       */
      public CategoryPlot(CategoryDataset dataset,
                          CategoryAxis domainAxis,
                          ValueAxis rangeAxis,
                          CategoryItemRenderer renderer) {
  
          super();
  
          this.orientation = PlotOrientation.VERTICAL;
  
          // allocate storage for dataset, axes and renderers
          this.domainAxes = new ObjectList<CategoryAxis>();
          this.domainAxisLocations = new ObjectList<AxisLocation>();
          this.rangeAxes = new ObjectList<ValueAxis>();
          this.rangeAxisLocations = new ObjectList<AxisLocation>();
  
          this.datasetToDomainAxesMap = new TreeMap<Integer, List<Integer>>();
          this.datasetToRangeAxesMap = new TreeMap<Integer, List<Integer>>();
  
          this.renderers = new ObjectList<CategoryItemRenderer>();
  
          this.datasets = new ObjectList<CategoryDataset>();
          this.datasets.set(0, dataset);
          if (dataset != null) {
              dataset.addChangeListener(this);
          }
  
          this.axisOffset = RectangleInsets.ZERO_INSETS;
  
          setDomainAxisLocation(AxisLocation.BOTTOM_OR_LEFT, false);
          setRangeAxisLocation(AxisLocation.TOP_OR_LEFT, false);
  
          this.renderers.set(0, renderer);
          if (renderer != null) {
              renderer.setPlot(this);
              renderer.addChangeListener(this);
          }
  
          this.domainAxes.set(0, domainAxis);
          this.mapDatasetToDomainAxis(0, 0);
          if (domainAxis != null) {
              domainAxis.setPlot(this);
              domainAxis.addChangeListener(this);
          }
          this.drawSharedDomainAxis = false;
  
          this.rangeAxes.set(0, rangeAxis);
          this.mapDatasetToRangeAxis(0, 0);
          if (rangeAxis != null) {
              rangeAxis.setPlot(this);
              rangeAxis.addChangeListener(this);
          }
  
          configureDomainAxes();
          configureRangeAxes();
  
          this.domainGridlinesVisible = DEFAULT_DOMAIN_GRIDLINES_VISIBLE;
          this.domainGridlinePosition = CategoryAnchor.MIDDLE;
          this.domainGridlineStroke = DEFAULT_GRIDLINE_STROKE;
          this.domainGridlinePaint = DEFAULT_GRIDLINE_PAINT;
  
          this.rangeZeroBaselineVisible = false;
          this.rangeZeroBaselinePaint = Color.BLACK;
          this.rangeZeroBaselineStroke = new BasicStroke(0.5f);
  
          this.rangeGridlinesVisible = DEFAULT_RANGE_GRIDLINES_VISIBLE;
          this.rangeGridlineStroke = DEFAULT_GRIDLINE_STROKE;
          this.rangeGridlinePaint = DEFAULT_GRIDLINE_PAINT;
  
          this.rangeMinorGridlinesVisible = false;
          this.rangeMinorGridlineStroke = DEFAULT_GRIDLINE_STROKE;
          this.rangeMinorGridlinePaint = Color.WHITE;
  
          this.foregroundDomainMarkers = new HashMap<Integer, Collection<Marker>>();
          this.backgroundDomainMarkers = new HashMap<Integer, Collection<Marker>>();
          this.foregroundRangeMarkers = new HashMap<Integer, Collection<Marker>>();
          this.backgroundRangeMarkers = new HashMap<Integer, Collection<Marker>>();
  
          this.anchorValue = 0.0;
  
          this.domainCrosshairVisible = false;
          this.domainCrosshairStroke = DEFAULT_CROSSHAIR_STROKE;
          this.domainCrosshairPaint = DEFAULT_CROSSHAIR_PAINT;
  
          this.rangeCrosshairVisible = DEFAULT_CROSSHAIR_VISIBLE;
          this.rangeCrosshairValue = 0.0;
          this.rangeCrosshairStroke = DEFAULT_CROSSHAIR_STROKE;
          this.rangeCrosshairPaint = DEFAULT_CROSSHAIR_PAINT;
  
          this.annotations = new java.util.ArrayList<CategoryAnnotation>();
  
          this.rangePannable = false;
          this.shadowGenerator = null;
      }
  
      /**
       * Returns a string describing the type of plot.
       *
       * @return The type.
       */
      @Override
      public String getPlotType() {
          return localizationResources.getString("Category_Plot");
      }
  
      /**
       * Returns the orientation of the plot.
       *
       * @return The orientation of the plot (never <code>null</code>).
       *
       * @see #setOrientation(PlotOrientation)
       */
      @Override
      public PlotOrientation getOrientation() {
          return this.orientation;
      }
  
      /**
       * Sets the orientation for the plot and sends a {@link PlotChangeEvent} to
       * all registered listeners.
       *
       * @param orientation  the orientation (<code>null</code> not permitted).
       *
       * @see #getOrientation()
       */
      public void setOrientation(PlotOrientation orientation) {
          if (orientation == null) {
              throw new IllegalArgumentException("Null 'orientation' argument.");
          }
          this.orientation = orientation;
          fireChangeEvent();
      }
  
      /**
       * Returns the axis offset.
       *
       * @return The axis offset (never <code>null</code>).
       *
       * @see #setAxisOffset(RectangleInsets)
       */
      public RectangleInsets getAxisOffset() {
          return this.axisOffset;
      }
  
      /**
       * Sets the axis offsets (gap between the data area and the axes) and
       * sends a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param offset  the offset (<code>null</code> not permitted).
       *
       * @see #getAxisOffset()
       */
      public void setAxisOffset(RectangleInsets offset) {
          if (offset == null) {
              throw new IllegalArgumentException("Null 'offset' argument.");
          }
          this.axisOffset = offset;
          fireChangeEvent();
      }
  
      /**
       * Returns the domain axis for the plot.  If the domain axis for this plot
       * is <code>null</code>, then the method will return the parent plot's
       * domain axis (if there is a parent plot).
       *
       * @return The domain axis (<code>null</code> permitted).
       *
       * @see #setDomainAxis(CategoryAxis)
       */
      public CategoryAxis getDomainAxis() {
          return getDomainAxis(0);
      }
  
      /**
       * Returns a domain axis.
       *
       * @param index  the axis index.
       *
       * @return The axis (<code>null</code> possible).
       *
       * @see #setDomainAxis(int, CategoryAxis)
       */
      public CategoryAxis getDomainAxis(int index) {
          CategoryAxis result = null;
          if (index < this.domainAxes.size()) {
              result = this.domainAxes.get(index);
          }
          if (result == null) {
              Plot parent = getParent();
              if (parent instanceof CategoryPlot) {
                  CategoryPlot cp = (CategoryPlot) parent;
                  result = cp.getDomainAxis(index);
              }
          }
          return result;
      }
  
      /**
       * Sets the domain axis for the plot and sends a {@link PlotChangeEvent} to
       * all registered listeners.
       *
       * @param axis  the axis (<code>null</code> permitted).
       *
       * @see #getDomainAxis()
       */
      public void setDomainAxis(CategoryAxis axis) {
          setDomainAxis(0, axis);
      }
  
      /**
       * Sets a domain axis and sends a {@link PlotChangeEvent} to all
       * registered listeners.
       *
       * @param index  the axis index.
       * @param axis  the axis (<code>null</code> permitted).
       *
       * @see #getDomainAxis(int)
       */
      public void setDomainAxis(int index, CategoryAxis axis) {
          setDomainAxis(index, axis, true);
      }
  
      /**
       * Sets a domain axis and, if requested, sends a {@link PlotChangeEvent} to
       * all registered listeners.
       *
       * @param index  the axis index.
       * @param axis  the axis (<code>null</code> permitted).
       * @param notify  notify listeners?
       */
      public void setDomainAxis(int index, CategoryAxis axis, boolean notify) {
          CategoryAxis existing = this.domainAxes.get(index);
          if (existing != null) {
              existing.removeChangeListener(this);
          }
          if (axis != null) {
              axis.setPlot(this);
          }
          this.domainAxes.set(index, axis);
          if (axis != null) {
              axis.configure();
              axis.addChangeListener(this);
          }
          if (notify) {
              fireChangeEvent();
          }
      }
  
      /**
       * Sets the domain axes for this plot and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param axes  the axes (<code>null</code> not permitted).
       *
       * @see #setRangeAxes(ValueAxis[])
       */
      public void setDomainAxes(CategoryAxis[] axes) {
          for (int i = 0; i < axes.length; i++) {
              setDomainAxis(i, axes[i], false);
          }
          fireChangeEvent();
      }
  
      /**
       * Returns the index of the specified axis, or <code>-1</code> if the axis
       * is not assigned to the plot.
       *
       * @param axis  the axis (<code>null</code> not permitted).
       *
       * @return The axis index.
       *
       * @see #getDomainAxis(int)
       * @see #getRangeAxisIndex(ValueAxis)
       *
       * @since 1.0.3
       */
      public int getDomainAxisIndex(CategoryAxis axis) {
          if (axis == null) {
              throw new IllegalArgumentException("Null 'axis' argument.");
          }
          return this.domainAxes.indexOf(axis);
      }
  
      /**
       * Returns the domain axis location for the primary domain axis.
       *
       * @return The location (never <code>null</code>).
       *
       * @see #getRangeAxisLocation()
       */
      public AxisLocation getDomainAxisLocation() {
          return getDomainAxisLocation(0);
      }
  
      /**
       * Returns the location for a domain axis.
       *
       * @param index  the axis index.
       *
       * @return The location.
       *
       * @see #setDomainAxisLocation(int, AxisLocation)
       */
      public AxisLocation getDomainAxisLocation(int index) {
          AxisLocation result = null;
          if (index < this.domainAxisLocations.size()) {
              result = this.domainAxisLocations.get(index);
          }
          if (result == null) {
              result = AxisLocation.getOpposite(getDomainAxisLocation(0));
          }
          return result;
      }
  
      /**
       * Sets the location of the domain axis and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param location  the axis location (<code>null</code> not permitted).
       *
       * @see #getDomainAxisLocation()
       * @see #setDomainAxisLocation(int, AxisLocation)
       */
      public void setDomainAxisLocation(AxisLocation location) {
          // delegate...
          setDomainAxisLocation(0, location, true);
      }
  
      /**
       * Sets the location of the domain axis and, if requested, sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @param location  the axis location (<code>null</code> not permitted).
       * @param notify  a flag that controls whether listeners are notified.
       */
      public void setDomainAxisLocation(AxisLocation location, boolean notify) {
          // delegate...
          setDomainAxisLocation(0, location, notify);
      }
  
      /**
       * Sets the location for a domain axis and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param index  the axis index.
       * @param location  the location.
       *
       * @see #getDomainAxisLocation(int)
       * @see #setRangeAxisLocation(int, AxisLocation)
       */
      public void setDomainAxisLocation(int index, AxisLocation location) {
          // delegate...
          setDomainAxisLocation(index, location, true);
      }
  
      /**
       * Sets the location for a domain axis and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param index  the axis index.
       * @param location  the location.
       * @param notify  notify listeners?
       *
       * @since 1.0.5
       *
       * @see #getDomainAxisLocation(int)
       * @see #setRangeAxisLocation(int, AxisLocation, boolean)
       */
      public void setDomainAxisLocation(int index, AxisLocation location,
              boolean notify) {
          if (index == 0 && location == null) {
              throw new IllegalArgumentException(
                      "Null 'location' for index 0 not permitted.");
          }
          this.domainAxisLocations.set(index, location);
          if (notify) {
              fireChangeEvent();
          }
      }
  
      /**
       * Returns the domain axis edge.  This is derived from the axis location
       * and the plot orientation.
       *
       * @return The edge (never <code>null</code>).
       */
      public RectangleEdge getDomainAxisEdge() {
          return getDomainAxisEdge(0);
      }
  
      /**
       * Returns the edge for a domain axis.
       *
       * @param index  the axis index.
       *
       * @return The edge (never <code>null</code>).
       */
      public RectangleEdge getDomainAxisEdge(int index) {
          RectangleEdge result;
          AxisLocation location = getDomainAxisLocation(index);
          if (location != null) {
              result = Plot.resolveDomainAxisLocation(location, this.orientation);
          }
          else {
              result = RectangleEdge.opposite(getDomainAxisEdge(0));
          }
          return result;
      }
  
      /**
       * Returns the number of domain axes.
       *
       * @return The axis count.
       */
      public int getDomainAxisCount() {
          return this.domainAxes.size();
      }
  
      /**
       * Clears the domain axes from the plot and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       */
      public void clearDomainAxes() {
          for (int i = 0; i < this.domainAxes.size(); i++) {
              CategoryAxis axis = this.domainAxes.get(i);
              if (axis != null) {
                  axis.removeChangeListener(this);
              }
          }
          this.domainAxes.clear();
          fireChangeEvent();
      }
  
      /**
       * Configures the domain axes.
       */
      public void configureDomainAxes() {
          for (int i = 0; i < this.domainAxes.size(); i++) {
              CategoryAxis axis = this.domainAxes.get(i);
              if (axis != null) {
                  axis.configure();
              }
          }
      }
  
      /**
       * Returns the range axis for the plot.  If the range axis for this plot is
       * null, then the method will return the parent plot's range axis (if there
       * is a parent plot).
       *
       * @return The range axis (possibly <code>null</code>).
       */
      public ValueAxis getRangeAxis() {
          return getRangeAxis(0);
      }
  
      /**
       * Returns a range axis.
       *
       * @param index  the axis index.
       *
       * @return The axis (<code>null</code> possible).
       */
      public ValueAxis getRangeAxis(int index) {
          ValueAxis result = null;
          if (index < this.rangeAxes.size()) {
              result = this.rangeAxes.get(index);
          }
          if (result == null) {
              Plot parent = getParent();
              if (parent instanceof CategoryPlot) {
                  CategoryPlot cp = (CategoryPlot) parent;
                  result = cp.getRangeAxis(index);
              }
          }
          return result;
      }
  
      /**
       * Sets the range axis for the plot and sends a {@link PlotChangeEvent} to
       * all registered listeners.
       *
       * @param axis  the axis (<code>null</code> permitted).
       */
      public void setRangeAxis(ValueAxis axis) {
          setRangeAxis(0, axis);
      }
  
      /**
       * Sets a range axis and sends a {@link PlotChangeEvent} to all registered
       * listeners.
       *
       * @param index  the axis index.
       * @param axis  the axis.
       */
      public void setRangeAxis(int index, ValueAxis axis) {
          setRangeAxis(index, axis, true);
      }
  
      /**
       * Sets a range axis and, if requested, sends a {@link PlotChangeEvent} to
       * all registered listeners.
       *
       * @param index  the axis index.
       * @param axis  the axis.
       * @param notify  notify listeners?
       */
      public void setRangeAxis(int index, ValueAxis axis, boolean notify) {
          ValueAxis existing = this.rangeAxes.get(index);
          if (existing != null) {
              existing.removeChangeListener(this);
          }
          if (axis != null) {
              axis.setPlot(this);
          }
          this.rangeAxes.set(index, axis);
          if (axis != null) {
              axis.configure();
              axis.addChangeListener(this);
          }
          if (notify) {
              fireChangeEvent();
          }
      }
  
      /**
       * Sets the range axes for this plot and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param axes  the axes (<code>null</code> not permitted).
       *
       * @see #setDomainAxes(CategoryAxis[])
       */
      public void setRangeAxes(ValueAxis[] axes) {
          for (int i = 0; i < axes.length; i++) {
              setRangeAxis(i, axes[i], false);
          }
          fireChangeEvent();
      }
  
      /**
       * Returns the index of the specified axis, or <code>-1</code> if the axis
       * is not assigned to the plot.
       *
       * @param axis  the axis (<code>null</code> not permitted).
       *
       * @return The axis index.
       *
       * @see #getRangeAxis(int)
       * @see #getDomainAxisIndex(CategoryAxis)
       *
       * @since 1.0.7
       */
      public int getRangeAxisIndex(ValueAxis axis) {
          if (axis == null) {
              throw new IllegalArgumentException("Null 'axis' argument.");
          }
          int result = this.rangeAxes.indexOf(axis);
          if (result < 0) { // try the parent plot
              Plot parent = getParent();
              if (parent instanceof CategoryPlot) {
                  CategoryPlot p = (CategoryPlot) parent;
                  result = p.getRangeAxisIndex(axis);
              }
          }
          return result;
      }
  
      /**
       * Returns the range axis location.
       *
       * @return The location (never <code>null</code>).
       */
      public AxisLocation getRangeAxisLocation() {
          return getRangeAxisLocation(0);
      }
  
      /**
       * Returns the location for a range axis.
       *
       * @param index  the axis index.
       *
       * @return The location.
       *
       * @see #setRangeAxisLocation(int, AxisLocation)
       */
      public AxisLocation getRangeAxisLocation(int index) {
          AxisLocation result = null;
          if (index < this.rangeAxisLocations.size()) {
              result = this.rangeAxisLocations.get(index);
          }
          if (result == null) {
              result = AxisLocation.getOpposite(getRangeAxisLocation(0));
          }
          return result;
      }
  
      /**
       * Sets the location of the range axis and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param location  the location (<code>null</code> not permitted).
       *
       * @see #setRangeAxisLocation(AxisLocation, boolean)
       * @see #setDomainAxisLocation(AxisLocation)
       */
      public void setRangeAxisLocation(AxisLocation location) {
          // defer argument checking...
          setRangeAxisLocation(location, true);
      }
  
      /**
       * Sets the location of the range axis and, if requested, sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @param location  the location (<code>null</code> not permitted).
       * @param notify  notify listeners?
       *
       * @see #setDomainAxisLocation(AxisLocation, boolean)
       */
      public void setRangeAxisLocation(AxisLocation location, boolean notify) {
          setRangeAxisLocation(0, location, notify);
      }
  
      /**
       * Sets the location for a range axis and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param index  the axis index.
       * @param location  the location.
       *
       * @see #getRangeAxisLocation(int)
       * @see #setRangeAxisLocation(int, AxisLocation, boolean)
       */
      public void setRangeAxisLocation(int index, AxisLocation location) {
          setRangeAxisLocation(index, location, true);
      }
  
      /**
       * Sets the location for a range axis and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param index  the axis index.
       * @param location  the location.
       * @param notify  notify listeners?
       *
       * @see #getRangeAxisLocation(int)
       * @see #setDomainAxisLocation(int, AxisLocation, boolean)
       */
      public void setRangeAxisLocation(int index, AxisLocation location,
                                       boolean notify) {
          if (index == 0 && location == null) {
              throw new IllegalArgumentException(
                      "Null 'location' for index 0 not permitted.");
          }
          this.rangeAxisLocations.set(index, location);
          if (notify) {
              fireChangeEvent();
          }
      }
  
      /**
       * Returns the edge where the primary range axis is located.
       *
       * @return The edge (never <code>null</code>).
       */
      public RectangleEdge getRangeAxisEdge() {
          return getRangeAxisEdge(0);
      }
  
      /**
       * Returns the edge for a range axis.
       *
       * @param index  the axis index.
       *
       * @return The edge.
       */
      public RectangleEdge getRangeAxisEdge(int index) {
          AxisLocation location = getRangeAxisLocation(index);
          return Plot.resolveRangeAxisLocation(location, this.orientation);
      }
  
      /**
       * Returns the number of range axes.
       *
       * @return The axis count.
       */
      public int getRangeAxisCount() {
          return this.rangeAxes.size();
      }
  
      /**
       * Clears the range axes from the plot and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       */
      public void clearRangeAxes() {
          for (int i = 0; i < this.rangeAxes.size(); i++) {
              ValueAxis axis = this.rangeAxes.get(i);
              if (axis != null) {
                  axis.removeChangeListener(this);
              }
          }
          this.rangeAxes.clear();
          fireChangeEvent();
      }
  
      /**
       * Configures the range axes.
       */
      public void configureRangeAxes() {
          for (int i = 0; i < this.rangeAxes.size(); i++) {
              ValueAxis axis = this.rangeAxes.get(i);
              if (axis != null) {
                  axis.configure();
              }
          }
      }
  
      /**
       * Returns the primary dataset for the plot.
       *
       * @return The primary dataset (possibly <code>null</code>).
       *
       * @see #setDataset(CategoryDataset)
       */
      public CategoryDataset getDataset() {
          return getDataset(0);
      }
  
      /**
       * Returns the dataset at the given index.
       *
       * @param index  the dataset index.
       *
       * @return The dataset (possibly <code>null</code>).
       *
       * @see #setDataset(int, CategoryDataset)
       */
      public CategoryDataset getDataset(int index) {
          CategoryDataset result = null;
          if (this.datasets.size() > index) {
              result = this.datasets.get(index);
          }
          return result;
      }
  
      /**
       * Sets the dataset for the plot, replacing the existing dataset, if there
       * is one.  This method also calls the
       * {@link #datasetChanged(DatasetChangeEvent)} method, which adjusts the
       * axis ranges if necessary and sends a {@link PlotChangeEvent} to all
       * registered listeners.
       *
       * @param dataset  the dataset (<code>null</code> permitted).
       *
       * @see #getDataset()
       */
      public void setDataset(CategoryDataset dataset) {
          setDataset(0, dataset);
      }
  
      /**
       * Sets a dataset for the plot.
       *
       * @param index  the dataset index.
       * @param dataset  the dataset (<code>null</code> permitted).
       *
       * @see #getDataset(int)
       */
      public void setDataset(int index, CategoryDataset dataset) {
  
          CategoryDataset existing = this.datasets.get(index);
          if (existing != null) {
              existing.removeChangeListener(this);
          }
          this.datasets.set(index, dataset);
          if (dataset != null) {
              dataset.addChangeListener(this);
          }
  
          // send a dataset change event to self...
          DatasetChangeEvent event = new DatasetChangeEvent(this, dataset);
          datasetChanged(event);
  
      }
  
      /**
       * Returns the number of datasets.
       *
       * @return The number of datasets.
       *
       * @since 1.0.2
       */
      public int getDatasetCount() {
          return this.datasets.size();
      }
  
      /**
       * Returns the index of the specified dataset, or <code>-1</code> if the
       * dataset does not belong to the plot.
       *
       * @param dataset  the dataset (<code>null</code> not permitted).
       *
       * @return The index.
       *
       * @since 1.0.11
       */
      public int indexOf(CategoryDataset dataset) {
          int result = -1;
          for (int i = 0; i < this.datasets.size(); i++) {
              if (dataset == this.datasets.get(i)) {
                  result = i;
                  break;
              }
          }
          return result;
      }
  
      /**
       * Maps a dataset to a particular domain axis.
       *
       * @param index  the dataset index (zero-based).
       * @param axisIndex  the axis index (zero-based).
       *
       * @see #getDomainAxisForDataset(int)
       */
      public void mapDatasetToDomainAxis(int index, int axisIndex) {
          List<Integer> axisIndices = new java.util.ArrayList<Integer>(1);
          axisIndices.add(axisIndex);
          mapDatasetToDomainAxes(index, axisIndices);
      }
  
      /**
       * Maps the specified dataset to the axes in the list.  Note that the
       * conversion of data values into Java2D space is always performed using
       * the first axis in the list.
       *
       * @param index  the dataset index (zero-based).
       * @param axisIndices  the axis indices (<code>null</code> permitted).
       *
       * @since 1.0.12
       */
      public void mapDatasetToDomainAxes(int index, List<Integer> axisIndices) {
          if (index < 0) {
              throw new IllegalArgumentException("Requires 'index' >= 0.");
          }
          checkAxisIndices(axisIndices);
          this.datasetToDomainAxesMap.put(index, new ArrayList<Integer>(axisIndices));
          // fake a dataset change event to update axes...
          datasetChanged(new DatasetChangeEvent(this, getDataset(index)));
      }
  
      /**
       * This method is used to perform argument checking on the list of
       * axis indices passed to mapDatasetToDomainAxes() and
       * mapDatasetToRangeAxes().
       *
       * @param indices  the list of indices (<code>null</code> permitted).
       */
      private void checkAxisIndices(List<Integer> indices) {
          // axisIndices can be:
          // 1.  null;
          // 2.  non-empty, containing only Integer objects that are unique.
          if (indices == null) {
              return;  // OK
          }
          int count = indices.size();
          if (count == 0) {
              throw new IllegalArgumentException("Empty list not permitted.");
          }
          HashSet<Integer> set = new HashSet<Integer>();
          for (Integer item : indices) {
              if (set.contains(item)) {
                  throw new IllegalArgumentException("Indices must be unique.");
              }
              set.add(item);
          }
      }
  
      /**
       * Returns the domain axis for a dataset.  You can change the axis for a
       * dataset using the {@link #mapDatasetToDomainAxis(int, int)} method.
       *
       * @param index  the dataset index.
       *
       * @return The domain axis.
       *
       * @see #mapDatasetToDomainAxis(int, int)
       */
      public CategoryAxis getDomainAxisForDataset(int index) {
          if (index < 0) {
              throw new IllegalArgumentException("Negative 'index'.");
          }
          CategoryAxis axis;
          List<Integer> axisIndices = this.datasetToDomainAxesMap.get(
                  Integer.valueOf(index));
          if (axisIndices != null) {
              // the first axis in the list is used for data <--> Java2D
              Integer axisIndex = axisIndices.get(0);
              axis = getDomainAxis(axisIndex);
          }
          else {
              axis = getDomainAxis(0);
          }
          return axis;
      }
  
      /**
       * Maps a dataset to a particular range axis.
       *
       * @param index  the dataset index (zero-based).
       * @param axisIndex  the axis index (zero-based).
       *
       * @see #getRangeAxisForDataset(int)
       */
      public void mapDatasetToRangeAxis(int index, int axisIndex) {
          List<Integer> axisIndices = new java.util.ArrayList<Integer>(1);
          axisIndices.add(axisIndex);
          mapDatasetToRangeAxes(index, axisIndices);
      }
  
      /**
       * Maps the specified dataset to the axes in the list.  Note that the
       * conversion of data values into Java2D space is always performed using
       * the first axis in the list.
       *
       * @param index  the dataset index (zero-based).
       * @param axisIndices  the axis indices (<code>null</code> permitted).
       *
       * @since 1.0.12
       */
      public void mapDatasetToRangeAxes(int index, List<Integer> axisIndices) {
          if (index < 0) {
              throw new IllegalArgumentException("Requires 'index' >= 0.");
          }
          checkAxisIndices(axisIndices);
          Integer key = index;
          this.datasetToRangeAxesMap.put(key, new ArrayList<Integer>(axisIndices));
          // fake a dataset change event to update axes...
          datasetChanged(new DatasetChangeEvent(this, getDataset(index)));
      }
  
      /**
       * Returns the range axis for a dataset.  You can change the axis for a
       * dataset using the {@link #mapDatasetToRangeAxis(int, int)} method.
       *
       * @param index  the dataset index.
       *
       * @return The range axis.
       *
       * @see #mapDatasetToRangeAxis(int, int)
       */
      public ValueAxis getRangeAxisForDataset(int index) {
          if (index < 0) {
              throw new IllegalArgumentException("Negative 'index'.");
          }
          ValueAxis axis;
          List<Integer> axisIndices = this.datasetToRangeAxesMap.get(
                  Integer.valueOf(index));
          if (axisIndices != null) {
              // the first axis in the list is used for data <--> Java2D
              Integer axisIndex = axisIndices.get(0);
              axis = getRangeAxis(axisIndex);
          }
          else {
              axis = getRangeAxis(0);
          }
          return axis;
      }
  
      /**
       * Returns the number of renderer slots for this plot.
       *
       * @return The number of renderer slots.
       *
       * @since 1.0.11
       */
      public int getRendererCount() {
          return this.renderers.size();
      }
  
      /**
       * Returns a reference to the renderer for the plot.
       *
       * @return The renderer.
       *
       * @see #setRenderer(CategoryItemRenderer)
       */
      public CategoryItemRenderer getRenderer() {
          return getRenderer(0);
      }
  
      /**
       * Returns the renderer at the given index.
       *
       * @param index  the renderer index.
       *
       * @return The renderer (possibly <code>null</code>).
       *
       * @see #setRenderer(int, CategoryItemRenderer)
       */
      public CategoryItemRenderer getRenderer(int index) {
          CategoryItemRenderer result = null;
          if (this.renderers.size() > index) {
              result = this.renderers.get(index);
          }
          return result;
      }
  
      /**
       * Sets the renderer at index 0 (sometimes referred to as the "primary"
       * renderer) and sends a {@link PlotChangeEvent} to all registered
       * listeners.
       *
       * @param renderer  the renderer (<code>null</code> permitted.
       *
       * @see #getRenderer()
       */
      public void setRenderer(CategoryItemRenderer renderer) {
          setRenderer(0, renderer, true);
      }
  
      /**
       * Sets the renderer at index 0 (sometimes referred to as the "primary"
       * renderer) and, if requested, sends a {@link PlotChangeEvent} to all
       * registered listeners.
       * <p>
       * You can set the renderer to <code>null</code>, but this is not
       * recommended because:
       * <ul>
       *   <li>no data will be displayed;</li>
       *   <li>the plot background will not be painted;</li>
       * </ul>
       *
       * @param renderer  the renderer (<code>null</code> permitted).
       * @param notify  notify listeners?
       *
       * @see #getRenderer()
       */
      public void setRenderer(CategoryItemRenderer renderer, boolean notify) {
          setRenderer(0, renderer, notify);
      }
  
      /**
       * Sets the renderer at the specified index and sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @param index  the index.
       * @param renderer  the renderer (<code>null</code> permitted).
       *
       * @see #getRenderer(int)
       * @see #setRenderer(int, CategoryItemRenderer, boolean)
       */
      public void setRenderer(int index, CategoryItemRenderer renderer) {
          setRenderer(index, renderer, true);
      }
  
      /**
       * Sets a renderer.  A {@link PlotChangeEvent} is sent to all registered
       * listeners.
       *
       * @param index  the index.
       * @param renderer  the renderer (<code>null</code> permitted).
       * @param notify  notify listeners?
       *
       * @see #getRenderer(int)
       */
      public void setRenderer(int index, CategoryItemRenderer renderer,
                              boolean notify) {
  
          // stop listening to the existing renderer...
          CategoryItemRenderer existing
              = this.renderers.get(index);
          if (existing != null) {
              existing.removeChangeListener(this);
          }
  
          // register the new renderer...
          this.renderers.set(index, renderer);
          if (renderer != null) {
              renderer.setPlot(this);
              renderer.addChangeListener(this);
          }
  
          configureDomainAxes();
          configureRangeAxes();
  
          if (notify) {
              fireChangeEvent();
          }
      }
  
      /**
       * Sets the renderers for this plot and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param renderers  the renderers.
       */
      public void setRenderers(CategoryItemRenderer[] renderers) {
          for (int i = 0; i < renderers.length; i++) {
              setRenderer(i, renderers[i], false);
          }
          fireChangeEvent();
      }
  
      /**
       * Returns the renderer for the specified dataset.  If the dataset doesn't
       * belong to the plot, this method will return <code>null</code>.
       *
       * @param dataset  the dataset (<code>null</code> permitted).
       *
       * @return The renderer (possibly <code>null</code>).
       */
      public CategoryItemRenderer getRendererForDataset(CategoryDataset dataset) {
          CategoryItemRenderer result = null;
          for (int i = 0; i < this.datasets.size(); i++) {
              if (this.datasets.get(i) == dataset) {
                  result = this.renderers.get(i);
                  break;
              }
          }
          return result;
      }
  
      /**
       * Returns the index of the specified renderer, or <code>-1</code> if the
       * renderer is not assigned to this plot.
       *
       * @param renderer  the renderer (<code>null</code> permitted).
       *
       * @return The renderer index.
       */
      public int getIndexOf(CategoryItemRenderer renderer) {
          return this.renderers.indexOf(renderer);
      }
  
      /**
       * Returns the dataset rendering order.
       *
       * @return The order (never <code>null</code>).
       *
       * @see #setDatasetRenderingOrder(DatasetRenderingOrder)
       */
      public DatasetRenderingOrder getDatasetRenderingOrder() {
          return this.renderingOrder;
      }
  
      /**
       * Sets the rendering order and sends a {@link PlotChangeEvent} to all
       * registered listeners.  By default, the plot renders the primary dataset
       * last (so that the primary dataset overlays the secondary datasets).  You
       * can reverse this if you want to.
       *
       * @param order  the rendering order (<code>null</code> not permitted).
       *
       * @see #getDatasetRenderingOrder()
       */
      public void setDatasetRenderingOrder(DatasetRenderingOrder order) {
          if (order == null) {
              throw new IllegalArgumentException("Null 'order' argument.");
          }
          this.renderingOrder = order;
          fireChangeEvent();
      }
  
      /**
       * Returns the order in which the columns are rendered.  The default value
       * is <code>SortOrder.ASCENDING</code>.
       *
       * @return The column rendering order (never <code>null</code).
       *
       * @see #setColumnRenderingOrder(SortOrder)
       */
      public SortOrder getColumnRenderingOrder() {
          return this.columnRenderingOrder;
      }
  
      /**
       * Sets the column order in which the items in each dataset should be
       * rendered and sends a {@link PlotChangeEvent} to all registered
       * listeners.  Note that this affects the order in which items are drawn,
       * NOT their position in the chart.
       *
       * @param order  the order (<code>null</code> not permitted).
       *
       * @see #getColumnRenderingOrder()
       * @see #setRowRenderingOrder(SortOrder)
       */
      public void setColumnRenderingOrder(SortOrder order) {
          if (order == null) {
              throw new IllegalArgumentException("Null 'order' argument.");
          }
          this.columnRenderingOrder = order;
          fireChangeEvent();
      }
  
      /**
       * Returns the order in which the rows should be rendered.  The default
       * value is <code>SortOrder.ASCENDING</code>.
       *
       * @return The order (never <code>null</code>).
       *
       * @see #setRowRenderingOrder(SortOrder)
       */
      public SortOrder getRowRenderingOrder() {
          return this.rowRenderingOrder;
      }
  
      /**
       * Sets the row order in which the items in each dataset should be
       * rendered and sends a {@link PlotChangeEvent} to all registered
       * listeners.  Note that this affects the order in which items are drawn,
       * NOT their position in the chart.
       *
       * @param order  the order (<code>null</code> not permitted).
       *
       * @see #getRowRenderingOrder()
       * @see #setColumnRenderingOrder(SortOrder)
       */
      public void setRowRenderingOrder(SortOrder order) {
          if (order == null) {
              throw new IllegalArgumentException("Null 'order' argument.");
          }
          this.rowRenderingOrder = order;
          fireChangeEvent();
      }
  
      /**
       * Returns the flag that controls whether the domain grid-lines are visible.
       *
       * @return The <code>true</code> or <code>false</code>.
       *
       * @see #setDomainGridlinesVisible(boolean)
       */
      public boolean isDomainGridlinesVisible() {
          return this.domainGridlinesVisible;
      }
  
      /**
       * Sets the flag that controls whether or not grid-lines are drawn against
       * the domain axis.
       * <p>
       * If the flag value changes, a {@link PlotChangeEvent} is sent to all
       * registered listeners.
       *
       * @param visible  the new value of the flag.
       *
       * @see #isDomainGridlinesVisible()
       */
      public void setDomainGridlinesVisible(boolean visible) {
          if (this.domainGridlinesVisible != visible) {
              this.domainGridlinesVisible = visible;
              fireChangeEvent();
          }
      }
  
      /**
       * Returns the position used for the domain gridlines.
       *
       * @return The gridline position (never <code>null</code>).
       *
       * @see #setDomainGridlinePosition(CategoryAnchor)
       */
      public CategoryAnchor getDomainGridlinePosition() {
          return this.domainGridlinePosition;
      }
  
      /**
       * Sets the position used for the domain gridlines and sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @param position  the position (<code>null</code> not permitted).
       *
       * @see #getDomainGridlinePosition()
       */
      public void setDomainGridlinePosition(CategoryAnchor position) {
          if (position == null) {
              throw new IllegalArgumentException("Null 'position' argument.");
          }
          this.domainGridlinePosition = position;
          fireChangeEvent();
      }
  
      /**
       * Returns the stroke used to draw grid-lines against the domain axis.
       *
       * @return The stroke (never <code>null</code>).
       *
       * @see #setDomainGridlineStroke(Stroke)
       */
      public Stroke getDomainGridlineStroke() {
          return this.domainGridlineStroke;
      }
  
      /**
       * Sets the stroke used to draw grid-lines against the domain axis and
       * sends a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param stroke  the stroke (<code>null</code> not permitted).
       *
       * @see #getDomainGridlineStroke()
       */
      public void setDomainGridlineStroke(Stroke stroke) {
          if (stroke == null) {
              throw new IllegalArgumentException("Null 'stroke' not permitted.");
          }
          this.domainGridlineStroke = stroke;
          fireChangeEvent();
      }
  
      /**
       * Returns the paint used to draw grid-lines against the domain axis.
       *
       * @return The paint (never <code>null</code>).
       *
       * @see #setDomainGridlinePaint(Paint)
       */
      public Paint getDomainGridlinePaint() {
          return this.domainGridlinePaint;
      }
  
      /**
       * Sets the paint used to draw the grid-lines (if any) against the domain
       * axis and sends a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param paint  the paint (<code>null</code> not permitted).
       *
       * @see #getDomainGridlinePaint()
       */
      public void setDomainGridlinePaint(Paint paint) {
          if (paint == null) {
              throw new IllegalArgumentException("Null 'paint' argument.");
          }
          this.domainGridlinePaint = paint;
          fireChangeEvent();
      }
  
      /**
       * Returns a flag that controls whether or not a zero baseline is
       * displayed for the range axis.
       *
       * @return A boolean.
       *
       * @see #setRangeZeroBaselineVisible(boolean)
       *
       * @since 1.0.13
       */
      public boolean isRangeZeroBaselineVisible() {
          return this.rangeZeroBaselineVisible;
      }
  
      /**
       * Sets the flag that controls whether or not the zero baseline is
       * displayed for the range axis, and sends a {@link PlotChangeEvent} to
       * all registered listeners.
       *
       * @param visible  the flag.
       *
       * @see #isRangeZeroBaselineVisible()
       *
       * @since 1.0.13
       */
      public void setRangeZeroBaselineVisible(boolean visible) {
          this.rangeZeroBaselineVisible = visible;
          fireChangeEvent();
      }
  
      /**
       * Returns the stroke used for the zero baseline against the range axis.
       *
       * @return The stroke (never <code>null</code>).
       *
       * @see #setRangeZeroBaselineStroke(Stroke)
       *
       * @since 1.0.13
       */
      public Stroke getRangeZeroBaselineStroke() {
          return this.rangeZeroBaselineStroke;
      }
  
      /**
       * Sets the stroke for the zero baseline for the range axis,
       * and sends a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param stroke  the stroke (<code>null</code> not permitted).
       *
       * @see #getRangeZeroBaselineStroke()
       *
       * @since 1.0.13
       */
      public void setRangeZeroBaselineStroke(Stroke stroke) {
          if (stroke == null) {
              throw new IllegalArgumentException("Null 'stroke' argument.");
          }
          this.rangeZeroBaselineStroke = stroke;
          fireChangeEvent();
      }
  
      /**
       * Returns the paint for the zero baseline (if any) plotted against the
       * range axis.
       *
       * @return The paint (never <code>null</code>).
       *
       * @see #setRangeZeroBaselinePaint(Paint)
       *
       * @since 1.0.13
       */
      public Paint getRangeZeroBaselinePaint() {
          return this.rangeZeroBaselinePaint;
      }
  
      /**
       * Sets the paint for the zero baseline plotted against the range axis and
       * sends a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param paint  the paint (<code>null</code> not permitted).
       *
       * @see #getRangeZeroBaselinePaint()
       *
       * @since 1.0.13
       */
      public void setRangeZeroBaselinePaint(Paint paint) {
          if (paint == null) {
              throw new IllegalArgumentException("Null 'paint' argument.");
          }
          this.rangeZeroBaselinePaint = paint;
          fireChangeEvent();
      }
  
      /**
       * Returns the flag that controls whether the range grid-lines are visible.
       *
       * @return The flag.
       *
       * @see #setRangeGridlinesVisible(boolean)
       */
      public boolean isRangeGridlinesVisible() {
          return this.rangeGridlinesVisible;
      }
  
      /**
       * Sets the flag that controls whether or not grid-lines are drawn against
       * the range axis.  If the flag changes value, a {@link PlotChangeEvent} is
       * sent to all registered listeners.
       *
       * @param visible  the new value of the flag.
       *
       * @see #isRangeGridlinesVisible()
       */
      public void setRangeGridlinesVisible(boolean visible) {
          if (this.rangeGridlinesVisible != visible) {
              this.rangeGridlinesVisible = visible;
              fireChangeEvent();
          }
      }
  
      /**
       * Returns the stroke used to draw the grid-lines against the range axis.
       *
       * @return The stroke (never <code>null</code>).
       *
       * @see #setRangeGridlineStroke(Stroke)
       */
      public Stroke getRangeGridlineStroke() {
          return this.rangeGridlineStroke;
      }
  
      /**
       * Sets the stroke used to draw the grid-lines against the range axis and
       * sends a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param stroke  the stroke (<code>null</code> not permitted).
       *
       * @see #getRangeGridlineStroke()
       */
      public void setRangeGridlineStroke(Stroke stroke) {
          if (stroke == null) {
              throw new IllegalArgumentException("Null 'stroke' argument.");
          }
          this.rangeGridlineStroke = stroke;
          fireChangeEvent();
      }
  
      /**
       * Returns the paint used to draw the grid-lines against the range axis.
       *
       * @return The paint (never <code>null</code>).
       *
       * @see #setRangeGridlinePaint(Paint)
       */
      public Paint getRangeGridlinePaint() {
          return this.rangeGridlinePaint;
      }
  
      /**
       * Sets the paint used to draw the grid lines against the range axis and
       * sends a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param paint  the paint (<code>null</code> not permitted).
       *
       * @see #getRangeGridlinePaint()
       */
      public void setRangeGridlinePaint(Paint paint) {
          if (paint == null) {
              throw new IllegalArgumentException("Null 'paint' argument.");
          }
          this.rangeGridlinePaint = paint;
          fireChangeEvent();
      }
  
      /**
       * Returns <code>true</code> if the range axis minor grid is visible, and
       * <code>false</code> otherwise.
       *
       * @return A boolean.
       *
       * @see #setRangeMinorGridlinesVisible(boolean)
       *
       * @since 1.0.13
       */
      public boolean isRangeMinorGridlinesVisible() {
          return this.rangeMinorGridlinesVisible;
      }
  
      /**
       * Sets the flag that controls whether or not the range axis minor grid
       * lines are visible.
       * <p>
       * If the flag value is changed, a {@link PlotChangeEvent} is sent to all
       * registered listeners.
       *
       * @param visible  the new value of the flag.
       *
       * @see #isRangeMinorGridlinesVisible()
       *
       * @since 1.0.13
       */
      public void setRangeMinorGridlinesVisible(boolean visible) {
          if (this.rangeMinorGridlinesVisible != visible) {
              this.rangeMinorGridlinesVisible = visible;
              fireChangeEvent();
          }
      }
  
      /**
       * Returns the stroke for the minor grid lines (if any) plotted against the
       * range axis.
       *
       * @return The stroke (never <code>null</code>).
       *
       * @see #setRangeMinorGridlineStroke(Stroke)
       *
       * @since 1.0.13
       */
      public Stroke getRangeMinorGridlineStroke() {
          return this.rangeMinorGridlineStroke;
      }
  
      /**
       * Sets the stroke for the minor grid lines plotted against the range axis,
       * and sends a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param stroke  the stroke (<code>null</code> not permitted).
       *
       * @see #getRangeMinorGridlineStroke()
       *
       * @since 1.0.13
       */
      public void setRangeMinorGridlineStroke(Stroke stroke) {
          if (stroke == null) {
              throw new IllegalArgumentException("Null 'stroke' argument.");
          }
          this.rangeMinorGridlineStroke = stroke;
          fireChangeEvent();
      }
  
      /**
       * Returns the paint for the minor grid lines (if any) plotted against the
       * range axis.
       *
       * @return The paint (never <code>null</code>).
       *
       * @see #setRangeMinorGridlinePaint(Paint)
       *
       * @since 1.0.13
       */
      public Paint getRangeMinorGridlinePaint() {
          return this.rangeMinorGridlinePaint;
      }
  
      /**
       * Sets the paint for the minor grid lines plotted against the range axis
       * and sends a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param paint  the paint (<code>null</code> not permitted).
       *
       * @see #getRangeMinorGridlinePaint()
       *
       * @since 1.0.13
       */
      public void setRangeMinorGridlinePaint(Paint paint) {
          if (paint == null) {
              throw new IllegalArgumentException("Null 'paint' argument.");
          }
          this.rangeMinorGridlinePaint = paint;
          fireChangeEvent();
      }
  
      /**
       * Returns the fixed legend items, if any.
       *
       * @return The legend items (possibly <code>null</code>).
       *
       * @see #setFixedLegendItems(LegendItemCollection)
       */
      public List<LegendItem> getFixedLegendItems() {
          return this.fixedLegendItems;
      }
  
      /**
       * Sets the fixed legend items for the plot.  Leave this set to
       * <code>null</code> if you prefer the legend items to be created
       * automatically.
       *
       * @param items  the legend items (<code>null</code> permitted).
       *
       * @see #getFixedLegendItems()
       */
      public void setFixedLegendItems(List<LegendItem> items) {
          this.fixedLegendItems = items;
          fireChangeEvent();
      }
  
      /**
       * Returns the legend items for the plot.  By default, this method creates
       * a legend item for each series in each of the datasets.  You can change
       * this behaviour by overriding this method.
       *
       * @return The legend items.
       */
      @Override
      public List<LegendItem> getLegendItems() {
          if (this.fixedLegendItems != null) {
              return this.fixedLegendItems;
          }
          List<LegendItem> result = new ArrayList<LegendItem>();
          // get the legend items for the datasets...
          int count = this.datasets.size();
          for (int datasetIndex = 0; datasetIndex < count; datasetIndex++) {
              CategoryDataset dataset = getDataset(datasetIndex);
              if (dataset != null) {
                  CategoryItemRenderer renderer = getRenderer(datasetIndex);
                  if (renderer != null) {
                      result.addAll(renderer.getLegendItems());
                  }
              }
          }
          return result;
      }
  
      /**
       * Handles a 'click' on the plot by updating the anchor value.
       *
       * @param x  x-coordinate of the click (in Java2D space).
       * @param y  y-coordinate of the click (in Java2D space).
       * @param info  information about the plot's dimensions.
       *
       */
      @Override
      public void handleClick(int x, int y, PlotRenderingInfo info) {
  
          Rectangle2D dataArea = info.getDataArea();
          if (dataArea.contains(x, y)) {
              // set the anchor value for the range axis...
              double java2D = 0.0;
              if (this.orientation == PlotOrientation.HORIZONTAL) {
                  java2D = x;
              }
              else if (this.orientation == PlotOrientation.VERTICAL) {
                  java2D = y;
              }
              RectangleEdge edge = Plot.resolveRangeAxisLocation(
                      getRangeAxisLocation(), this.orientation);
              double value = getRangeAxis().java2DToValue(
                      java2D, info.getDataArea(), edge);
              setAnchorValue(value);
              setRangeCrosshairValue(value);
          }
  
      }
  
      /**
       * Zooms (in or out) on the plot's value axis.
       * <p>
       * If the value 0.0 is passed in as the zoom percent, the auto-range
       * calculation for the axis is restored (which sets the range to include
       * the minimum and maximum data values, thus displaying all the data).
       *
       * @param percent  the zoom amount.
       */
      @Override
      public void zoom(double percent) {
          if (percent > 0.0) {
              double range = getRangeAxis().getRange().getLength();
              double scaledRange = range * percent;
              getRangeAxis().setRange(this.anchorValue - scaledRange / 2.0,
                      this.anchorValue + scaledRange / 2.0);
          }
          else {
              getRangeAxis().setAutoRange(true);
          }
      }
  
      /**
       * Receives notification of a change to an {@link Annotation} added to
       * this plot.
       *
       * @param event  information about the event (not used here).
       *
       * @since 1.0.14
       */
      @Override
      public void annotationChanged(AnnotationChangeEvent event) {
          if (getParent() != null) {
              getParent().annotationChanged(event);
          }
          else {
              PlotChangeEvent e = new PlotChangeEvent(this);
              notifyListeners(e);
          }
      }
  
      /**
       * Receives notification of a change to the plot's dataset.
       * <P>
       * The range axis bounds will be recalculated if necessary.
       *
       * @param event  information about the event (not used here).
       */
      @Override
      public void datasetChanged(DatasetChangeEvent event) {
  
          int count = this.rangeAxes.size();
          for (int axisIndex = 0; axisIndex < count; axisIndex++) {
              ValueAxis yAxis = getRangeAxis(axisIndex);
              if (yAxis != null) {
                  yAxis.configure();
              }
          }
          if (getParent() != null) {
              getParent().datasetChanged(event);
          }
          else {
              PlotChangeEvent e = new PlotChangeEvent(this);
              e.setType(ChartChangeEventType.DATASET_UPDATED);
              notifyListeners(e);
          }
  
      }
  
      /**
       * Receives notification of a renderer change event.
       *
       * @param event  the event.
       */
      @Override
      public void rendererChanged(RendererChangeEvent event) {
          Plot parent = getParent();
          if (parent != null) {
              if (parent instanceof RendererChangeListener) {
                  RendererChangeListener rcl = (RendererChangeListener) parent;
                  rcl.rendererChanged(event);
              }
              else {
                  // this should never happen with the existing code, but throw
                  // an exception in case future changes make it possible...
                  throw new RuntimeException(
                      "The renderer has changed and I don't know what to do!");
              }
          }
          else {
              configureRangeAxes();
              PlotChangeEvent e = new PlotChangeEvent(this);
              notifyListeners(e);
          }
      }
  
      /**
       * Adds a marker for display (in the foreground) against the domain axis and
       * sends a {@link PlotChangeEvent} to all registered listeners. Typically a
       * marker will be drawn by the renderer as a line perpendicular to the
       * domain axis, however this is entirely up to the renderer.
       *
       * @param marker  the marker (<code>null</code> not permitted).
       *
       * @see #removeDomainMarker(Marker)
       */
      public void addDomainMarker(CategoryMarker marker) {
          addDomainMarker(marker, Layer.FOREGROUND);
      }
  
      /**
       * Adds a marker for display against the domain axis and sends a
       * {@link PlotChangeEvent} to all registered listeners.  Typically a marker
       * will be drawn by the renderer as a line perpendicular to the domain
       * axis, however this is entirely up to the renderer.
       *
       * @param marker  the marker (<code>null</code> not permitted).
       * @param layer  the layer (foreground or background) (<code>null</code>
       *               not permitted).
       *
       * @see #removeDomainMarker(Marker, Layer)
       */
      public void addDomainMarker(CategoryMarker marker, Layer layer) {
          addDomainMarker(0, marker, layer);
      }
  
      /**
       * Adds a marker for display by a particular renderer and sends a
       * {@link PlotChangeEvent} to all registered listeners.
       * <P>
       * Typically a marker will be drawn by the renderer as a line perpendicular
       * to a domain axis, however this is entirely up to the renderer.
       *
       * @param index  the renderer index.
       * @param marker  the marker (<code>null</code> not permitted).
       * @param layer  the layer (<code>null</code> not permitted).
       *
       * @see #removeDomainMarker(int, Marker, Layer)
       */
      public void addDomainMarker(int index, CategoryMarker marker, Layer layer) {
          addDomainMarker(index, marker, layer, true);
      }
  
      /**
       * Adds a marker for display by a particular renderer and, if requested,
       * sends a {@link PlotChangeEvent} to all registered listeners.
       * <P>
       * Typically a marker will be drawn by the renderer as a line perpendicular
       * to a domain axis, however this is entirely up to the renderer.
       *
       * @param index  the renderer index.
       * @param marker  the marker (<code>null</code> not permitted).
       * @param layer  the layer (<code>null</code> not permitted).
       * @param notify  notify listeners?
       *
       * @since 1.0.10
       *
       * @see #removeDomainMarker(int, Marker, Layer, boolean)
       */
      public void addDomainMarker(int index, CategoryMarker marker, Layer layer,
              boolean notify) {
          if (marker == null) {
              throw new IllegalArgumentException("Null 'marker' not permitted.");
          }
          if (layer == null) {
              throw new IllegalArgumentException("Null 'layer' not permitted.");
          }
          Collection<Marker> markers;
          if (layer == Layer.FOREGROUND) {
              markers = this.foregroundDomainMarkers.get(
                      index);
              if (markers == null) {
                  markers = new java.util.ArrayList<Marker>();
                  this.foregroundDomainMarkers.put(index, markers);
              }
              markers.add(marker);
          }
          else if (layer == Layer.BACKGROUND) {
              markers = this.backgroundDomainMarkers.get(
                      index);
              if (markers == null) {
                  markers = new java.util.ArrayList<Marker>();
                  this.backgroundDomainMarkers.put(index, markers);
              }
              markers.add(marker);
          }
          marker.addChangeListener(this);
          if (notify) {
              fireChangeEvent();
          }
      }
  
      /**
       * Clears all the domain markers for the plot and sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @see #clearRangeMarkers()
       */
      public void clearDomainMarkers() {
          if (this.backgroundDomainMarkers != null) {
              Set<Integer> keys = this.backgroundDomainMarkers.keySet();
              for (Integer key : keys) {
                  clearDomainMarkers(key);
              }
              this.backgroundDomainMarkers.clear();
          }
          if (this.foregroundDomainMarkers != null) {
              Set<Integer> keys = this.foregroundDomainMarkers.keySet();
              for (Integer key : keys) {
                  clearDomainMarkers(key);
              }
              this.foregroundDomainMarkers.clear();
          }
          fireChangeEvent();
      }
  
      /**
       * Returns the list of domain markers (read only) for the specified layer.
       *
       * @param layer  the layer (foreground or background).
       *
       * @return The list of domain markers.
       */
      public Collection<Marker> getDomainMarkers(Layer layer) {
          return getDomainMarkers(0, layer);
      }
  
      /**
       * Returns a collection of domain markers for a particular renderer and
       * layer.
       *
       * @param index  the renderer index.
       * @param layer  the layer.
       *
       * @return A collection of markers (possibly <code>null</code>).
       */
      public Collection<Marker> getDomainMarkers(int index, Layer layer) {
          Collection<Marker> result = null;
          if (layer == Layer.FOREGROUND) {
              result = this.foregroundDomainMarkers.get(index);
          }
          else if (layer == Layer.BACKGROUND) {
              result = this.backgroundDomainMarkers.get(index);
          }
          if (result != null) {
              result = Collections.unmodifiableCollection(result);
          }
          return result;
      }
  
      /**
       * Clears all the domain markers for the specified renderer.
       *
       * @param index  the renderer index.
       *
       * @see #clearRangeMarkers(int)
       */
      public void clearDomainMarkers(int index) {
          if (this.backgroundDomainMarkers != null) {
              Collection<Marker> markers
                  = this.backgroundDomainMarkers.get(index);
              if (markers != null) {
                  for (Marker m : markers) {
                      m.removeChangeListener(this);
                  }
                  markers.clear();
              }
          }
          if (this.foregroundDomainMarkers != null) {
              Collection<Marker> markers = this.foregroundDomainMarkers.get(index);
              if (markers != null) {
                  for (Marker m : markers) {
                      m.removeChangeListener(this);
                  }
                  markers.clear();
              }
          }
          fireChangeEvent();
      }
  
      /**
       * Removes a marker for the domain axis and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param marker  the marker.
       *
       * @return A boolean indicating whether or not the marker was actually
       *         removed.
       *
       * @since 1.0.7
       */
      public boolean removeDomainMarker(Marker marker) {
          return removeDomainMarker(marker, Layer.FOREGROUND);
      }
  
      /**
       * Removes a marker for the domain axis in the specified layer and sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @param marker the marker (<code>null</code> not permitted).
       * @param layer the layer (foreground or background).
       *
       * @return A boolean indicating whether or not the marker was actually
       *         removed.
       *
       * @since 1.0.7
       */
      public boolean removeDomainMarker(Marker marker, Layer layer) {
          return removeDomainMarker(0, marker, layer);
      }
  
      /**
       * Removes a marker for a specific dataset/renderer and sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @param index the dataset/renderer index.
       * @param marker the marker.
       * @param layer the layer (foreground or background).
       *
       * @return A boolean indicating whether or not the marker was actually
       *         removed.
       *
       * @since 1.0.7
       */
      public boolean removeDomainMarker(int index, Marker marker, Layer layer) {
          return removeDomainMarker(index, marker, layer, true);
      }
  
      /**
       * Removes a marker for a specific dataset/renderer and, if requested,
       * sends a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param index the dataset/renderer index.
       * @param marker the marker.
       * @param layer the layer (foreground or background).
       * @param notify  notify listeners?
       *
       * @return A boolean indicating whether or not the marker was actually
       *         removed.
       *
       * @since 1.0.10
       */
      public boolean removeDomainMarker(int index, Marker marker, Layer layer,
              boolean notify) {
          Collection<Marker> markers;
          if (layer == Layer.FOREGROUND) {
              markers = this.foregroundDomainMarkers.get(index);
          }
          else {
              markers = this.backgroundDomainMarkers.get(index);
          }
          if (markers == null) {
              return false;
          }
          boolean removed = markers.remove(marker);
          if (removed && notify) {
              fireChangeEvent();
          }
          return removed;
      }
  
      /**
       * Adds a marker for display (in the foreground) against the range axis and
       * sends a {@link PlotChangeEvent} to all registered listeners. Typically a
       * marker will be drawn by the renderer as a line perpendicular to the
       * range axis, however this is entirely up to the renderer.
       *
       * @param marker  the marker (<code>null</code> not permitted).
       *
       * @see #removeRangeMarker(Marker)
       */
      public void addRangeMarker(Marker marker) {
          addRangeMarker(marker, Layer.FOREGROUND);
      }
  
      /**
       * Adds a marker for display against the range axis and sends a
       * {@link PlotChangeEvent} to all registered listeners.  Typically a marker
       * will be drawn by the renderer as a line perpendicular to the range axis,
       * however this is entirely up to the renderer.
       *
       * @param marker  the marker (<code>null</code> not permitted).
       * @param layer  the layer (foreground or background) (<code>null</code>
       *               not permitted).
       *
       * @see #removeRangeMarker(Marker, Layer)
       */
      public void addRangeMarker(Marker marker, Layer layer) {
          addRangeMarker(0, marker, layer);
      }
  
      /**
       * Adds a marker for display by a particular renderer and sends a
       * {@link PlotChangeEvent} to all registered listeners.
       * <P>
       * Typically a marker will be drawn by the renderer as a line perpendicular
       * to a range axis, however this is entirely up to the renderer.
       *
       * @param index  the renderer index.
       * @param marker  the marker.
       * @param layer  the layer.
       *
       * @see #removeRangeMarker(int, Marker, Layer)
       */
      public void addRangeMarker(int index, Marker marker, Layer layer) {
          addRangeMarker(index, marker, layer, true);
      }
  
      /**
       * Adds a marker for display by a particular renderer and sends a
       * {@link PlotChangeEvent} to all registered listeners.
       * <P>
       * Typically a marker will be drawn by the renderer as a line perpendicular
       * to a range axis, however this is entirely up to the renderer.
       *
       * @param index  the renderer index.
       * @param marker  the marker.
       * @param layer  the layer.
       * @param notify  notify listeners?
       *
       * @since 1.0.10
       *
       * @see #removeRangeMarker(int, Marker, Layer, boolean)
       */
      public void addRangeMarker(int index, Marker marker, Layer layer,
              boolean notify) {
          Collection<Marker> markers;
          if (layer == Layer.FOREGROUND) {
              markers = this.foregroundRangeMarkers.get(
                      index);
              if (markers == null) {
                  markers = new java.util.ArrayList<Marker>();
                  this.foregroundRangeMarkers.put(index, markers);
              }
              markers.add(marker);
          }
          else if (layer == Layer.BACKGROUND) {
              markers = this.backgroundRangeMarkers.get(
                      index);
              if (markers == null) {
                  markers = new java.util.ArrayList<Marker>();
                  this.backgroundRangeMarkers.put(index, markers);
              }
              markers.add(marker);
          }
          marker.addChangeListener(this);
          if (notify) {
              fireChangeEvent();
          }
      }
  
      /**
       * Clears all the range markers for the plot and sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @see #clearDomainMarkers()
       */
      public void clearRangeMarkers() {
          if (this.backgroundRangeMarkers != null) {
              Set<Integer> keys = this.backgroundRangeMarkers.keySet();
              for (Integer key : keys) {
                  clearRangeMarkers(key);
              }
              this.backgroundRangeMarkers.clear();
          }
          if (this.foregroundRangeMarkers != null) {
              Set<Integer> keys = this.foregroundRangeMarkers.keySet();
              for (Integer key : keys) {
                  clearRangeMarkers(key);
              }
              this.foregroundRangeMarkers.clear();
          }
          fireChangeEvent();
      }
  
      /**
       * Returns the list of range markers (read only) for the specified layer.
       *
       * @param layer  the layer (foreground or background).
       *
       * @return The list of range markers.
       *
       * @see #getRangeMarkers(int, Layer)
       */
      public Collection<Marker> getRangeMarkers(Layer layer) {
          return getRangeMarkers(0, layer);
      }
  
      /**
       * Returns a collection of range markers for a particular renderer and
       * layer.
       *
       * @param index  the renderer index.
       * @param layer  the layer.
       *
       * @return A collection of markers (possibly <code>null</code>).
       */
      public Collection<Marker> getRangeMarkers(int index, Layer layer) {
          Collection<Marker> result = null;
          Integer key = index;
          if (layer == Layer.FOREGROUND) {
              result = this.foregroundRangeMarkers.get(key);
          }
          else if (layer == Layer.BACKGROUND) {
              result = this.backgroundRangeMarkers.get(key);
          }
          if (result != null) {
              result = Collections.unmodifiableCollection(result);
          }
          return result;
      }
  
      /**
       * Clears all the range markers for the specified renderer.
       *
       * @param index  the renderer index.
       *
       * @see #clearDomainMarkers(int)
       */
      public void clearRangeMarkers(int index) {
          Integer key = index;
          if (this.backgroundRangeMarkers != null) {
              Collection<Marker> markers = this.backgroundRangeMarkers.get(key);
              if (markers != null) {
                  for (Marker m : markers) {
                      m.removeChangeListener(this);
                  }
                  markers.clear();
              }
          }
          if (this.foregroundRangeMarkers != null) {
              Collection<Marker> markers = this.foregroundRangeMarkers.get(key);
              if (markers != null) {
                  for (Marker m : markers) {
                      m.removeChangeListener(this);
                  }
                  markers.clear();
              }
          }
          fireChangeEvent();
      }
  
      /**
       * Removes a marker for the range axis and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param marker the marker.
       *
       * @return A boolean indicating whether or not the marker was actually
       *         removed.
       *
       * @since 1.0.7
       *
       * @see #addRangeMarker(Marker)
       */
      public boolean removeRangeMarker(Marker marker) {
          return removeRangeMarker(marker, Layer.FOREGROUND);
      }
  
      /**
       * Removes a marker for the range axis in the specified layer and sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @param marker the marker (<code>null</code> not permitted).
       * @param layer the layer (foreground or background).
       *
       * @return A boolean indicating whether or not the marker was actually
       *         removed.
       *
       * @since 1.0.7
       *
       * @see #addRangeMarker(Marker, Layer)
       */
      public boolean removeRangeMarker(Marker marker, Layer layer) {
          return removeRangeMarker(0, marker, layer);
      }
  
      /**
       * Removes a marker for a specific dataset/renderer and sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @param index the dataset/renderer index.
       * @param marker the marker.
       * @param layer the layer (foreground or background).
       *
       * @return A boolean indicating whether or not the marker was actually
       *         removed.
       *
       * @since 1.0.7
       *
       * @see #addRangeMarker(int, Marker, Layer)
       */
      public boolean removeRangeMarker(int index, Marker marker, Layer layer) {
          return removeRangeMarker(index, marker, layer, true);
      }
  
      /**
       * Removes a marker for a specific dataset/renderer and sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @param index  the dataset/renderer index.
       * @param marker  the marker.
       * @param layer  the layer (foreground or background).
       * @param notify  notify listeners.
       *
       * @return A boolean indicating whether or not the marker was actually
       *         removed.
       *
       * @since 1.0.10
       *
       * @see #addRangeMarker(int, Marker, Layer, boolean)
       */
      public boolean removeRangeMarker(int index, Marker marker, Layer layer,
              boolean notify) {
          if (marker == null) {
              throw new IllegalArgumentException("Null 'marker' argument.");
          }
          Collection<Marker> markers;
          if (layer == Layer.FOREGROUND) {
              markers = this.foregroundRangeMarkers.get(index);
          }
          else {
              markers = this.backgroundRangeMarkers.get(index);
          }
          if (markers == null) {
              return false;
          }
          boolean removed = markers.remove(marker);
          if (removed && notify) {
              fireChangeEvent();
          }
          return removed;
      }
  
      /**
       * Returns the flag that controls whether or not the domain crosshair is
       * displayed by the plot.
       *
       * @return A boolean.
       *
       * @since 1.0.11
       *
       * @see #setDomainCrosshairVisible(boolean)
       */
      public boolean isDomainCrosshairVisible() {
          return this.domainCrosshairVisible;
      }
  
      /**
       * Sets the flag that controls whether or not the domain crosshair is
       * displayed by the plot, and sends a {@link PlotChangeEvent} to all
       * registered listeners.
       *
       * @param flag  the new flag value.
       *
       * @since 1.0.11
       *
       * @see #isDomainCrosshairVisible()
       * @see #setRangeCrosshairVisible(boolean)
       */
      public void setDomainCrosshairVisible(boolean flag) {
          if (this.domainCrosshairVisible != flag) {
              this.domainCrosshairVisible = flag;
              fireChangeEvent();
          }
      }
  
      /**
       * Returns the row key for the domain crosshair.
       *
       * @return The row key.
       *
       * @since 1.0.11
       */
      public Comparable getDomainCrosshairRowKey() {
          return this.domainCrosshairRowKey;
      }
  
      /**
       * Sets the row key for the domain crosshair and sends a
       * {PlotChangeEvent} to all registered listeners.
       *
       * @param key  the key.
       *
       * @since 1.0.11
       */
      public void setDomainCrosshairRowKey(Comparable key) {
          setDomainCrosshairRowKey(key, true);
      }
  
      /**
       * Sets the row key for the domain crosshair and, if requested, sends a
       * {PlotChangeEvent} to all registered listeners.
       *
       * @param key  the key.
       * @param notify  notify listeners?
       *
       * @since 1.0.11
       */
      public void setDomainCrosshairRowKey(Comparable key, boolean notify) {
          this.domainCrosshairRowKey = key;
          if (notify) {
              fireChangeEvent();
          }
      }
  
      /**
       * Returns the column key for the domain crosshair.
       *
       * @return The column key.
       *
       * @since 1.0.11
       */
      public Comparable getDomainCrosshairColumnKey() {
          return this.domainCrosshairColumnKey;
      }
  
      /**
       * Sets the column key for the domain crosshair and sends
       * a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param key  the key.
       *
       * @since 1.0.11
       */
      public void setDomainCrosshairColumnKey(Comparable key) {
          setDomainCrosshairColumnKey(key, true);
      }
  
      /**
       * Sets the column key for the domain crosshair and, if requested, sends
       * a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param key  the key.
       * @param notify  notify listeners?
       *
       * @since 1.0.11
       */
      public void setDomainCrosshairColumnKey(Comparable key, boolean notify) {
          this.domainCrosshairColumnKey = key;
          if (notify) {
              fireChangeEvent();
          }
      }
  
      /**
       * Returns the dataset index for the crosshair.
       *
       * @return The dataset index.
       *
       * @since 1.0.11
       */
      public int getCrosshairDatasetIndex() {
          return this.crosshairDatasetIndex;
      }
  
      /**
       * Sets the dataset index for the crosshair and sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @param index  the index.
       *
       * @since 1.0.11
       */
      public void setCrosshairDatasetIndex(int index) {
          setCrosshairDatasetIndex(index, true);
      }
  
      /**
       * Sets the dataset index for the crosshair and, if requested, sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @param index  the index.
       * @param notify  notify listeners?
       *
       * @since 1.0.11
       */
      public void setCrosshairDatasetIndex(int index, boolean notify) {
          this.crosshairDatasetIndex = index;
          if (notify) {
              fireChangeEvent();
          }
      }
  
      /**
       * Returns the paint used to draw the domain crosshair.
       *
       * @return The paint (never <code>null</code>).
       *
       * @since 1.0.11
       *
       * @see #setDomainCrosshairPaint(Paint)
       * @see #getDomainCrosshairStroke()
       */
      public Paint getDomainCrosshairPaint() {
          return this.domainCrosshairPaint;
      }
  
      /**
       * Sets the paint used to draw the domain crosshair.
       *
       * @param paint  the paint (<code>null</code> not permitted).
       *
       * @since 1.0.11
       *
       * @see #getDomainCrosshairPaint()
       */
      public void setDomainCrosshairPaint(Paint paint) {
          if (paint == null) {
              throw new IllegalArgumentException("Null 'paint' argument.");
          }
          this.domainCrosshairPaint = paint;
          fireChangeEvent();
      }
  
      /**
       * Returns the stroke used to draw the domain crosshair.
       *
       * @return The stroke (never <code>null</code>).
       *
       * @since 1.0.11
       *
       * @see #setDomainCrosshairStroke(Stroke)
       * @see #getDomainCrosshairPaint()
       */
      public Stroke getDomainCrosshairStroke() {
          return this.domainCrosshairStroke;
      }
  
      /**
       * Sets the stroke used to draw the domain crosshair, and sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @param stroke  the stroke (<code>null</code> not permitted).
       *
       * @since 1.0.11
       *
       * @see #getDomainCrosshairStroke()
       */
      public void setDomainCrosshairStroke(Stroke stroke) {
          if (stroke == null) {
              throw new IllegalArgumentException("Null 'stroke' argument.");
          }
          this.domainCrosshairStroke = stroke;
      }
  
      /**
       * Returns a flag indicating whether or not the range crosshair is visible.
       *
       * @return The flag.
       *
       * @see #setRangeCrosshairVisible(boolean)
       */
      public boolean isRangeCrosshairVisible() {
          return this.rangeCrosshairVisible;
      }
  
      /**
       * Sets the flag indicating whether or not the range crosshair is visible.
       *
       * @param flag  the new value of the flag.
       *
       * @see #isRangeCrosshairVisible()
       */
      public void setRangeCrosshairVisible(boolean flag) {
          if (this.rangeCrosshairVisible != flag) {
              this.rangeCrosshairVisible = flag;
              fireChangeEvent();
          }
      }
  
      /**
       * Returns a flag indicating whether or not the crosshair should "lock-on"
       * to actual data values.
       *
       * @return The flag.
       *
       * @see #setRangeCrosshairLockedOnData(boolean)
       */
      public boolean isRangeCrosshairLockedOnData() {
          return this.rangeCrosshairLockedOnData;
      }
  
      /**
       * Sets the flag indicating whether or not the range crosshair should
       * "lock-on" to actual data values, and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param flag  the flag.
       *
       * @see #isRangeCrosshairLockedOnData()
       */
      public void setRangeCrosshairLockedOnData(boolean flag) {
          if (this.rangeCrosshairLockedOnData != flag) {
              this.rangeCrosshairLockedOnData = flag;
              fireChangeEvent();
          }
      }
  
      /**
       * Returns the range crosshair value.
       *
       * @return The value.
       *
       * @see #setRangeCrosshairValue(double)
       */
      public double getRangeCrosshairValue() {
          return this.rangeCrosshairValue;
      }
  
      /**
       * Sets the range crosshair value and, if the crosshair is visible, sends
       * a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param value  the new value.
       *
       * @see #getRangeCrosshairValue()
       */
      public void setRangeCrosshairValue(double value) {
          setRangeCrosshairValue(value, true);
      }
  
      /**
       * Sets the range crosshair value and, if requested, sends a
       * {@link PlotChangeEvent} to all registered listeners (but only if the
       * crosshair is visible).
       *
       * @param value  the new value.
       * @param notify  a flag that controls whether or not listeners are
       *                notified.
       *
       * @see #getRangeCrosshairValue()
       */
      public void setRangeCrosshairValue(double value, boolean notify) {
          this.rangeCrosshairValue = value;
          if (isRangeCrosshairVisible() && notify) {
              fireChangeEvent();
          }
      }
  
      /**
       * Returns the pen-style (<code>Stroke</code>) used to draw the crosshair
       * (if visible).
       *
       * @return The crosshair stroke (never <code>null</code>).
       *
       * @see #setRangeCrosshairStroke(Stroke)
       * @see #isRangeCrosshairVisible()
       * @see #getRangeCrosshairPaint()
       */
      public Stroke getRangeCrosshairStroke() {
          return this.rangeCrosshairStroke;
      }
  
      /**
       * Sets the pen-style (<code>Stroke</code>) used to draw the range
       * crosshair (if visible), and sends a {@link PlotChangeEvent} to all
       * registered listeners.
       *
       * @param stroke  the new crosshair stroke (<code>null</code> not
       *         permitted).
       *
       * @see #getRangeCrosshairStroke()
       */
      public void setRangeCrosshairStroke(Stroke stroke) {
          if (stroke == null) {
              throw new IllegalArgumentException("Null 'stroke' argument.");
          }
          this.rangeCrosshairStroke = stroke;
          fireChangeEvent();
      }
  
      /**
       * Returns the paint used to draw the range crosshair.
       *
       * @return The paint (never <code>null</code>).
       *
       * @see #setRangeCrosshairPaint(Paint)
       * @see #isRangeCrosshairVisible()
       * @see #getRangeCrosshairStroke()
       */
      public Paint getRangeCrosshairPaint() {
          return this.rangeCrosshairPaint;
      }
  
      /**
       * Sets the paint used to draw the range crosshair (if visible) and
       * sends a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param paint  the paint (<code>null</code> not permitted).
       *
       * @see #getRangeCrosshairPaint()
       */
      public void setRangeCrosshairPaint(Paint paint) {
          if (paint == null) {
              throw new IllegalArgumentException("Null 'paint' argument.");
          }
          this.rangeCrosshairPaint = paint;
          fireChangeEvent();
      }
  
      /**
       * Returns the list of annotations.
       *
       * @return The list of annotations (never <code>null</code>).
       *
       * @see #addAnnotation(CategoryAnnotation)
       * @see #clearAnnotations()
       */
      public List<CategoryAnnotation> getAnnotations() {
          return this.annotations;
      }
  
      /**
       * Adds an annotation to the plot and sends a {@link PlotChangeEvent} to all
       * registered listeners.
       *
       * @param annotation  the annotation (<code>null</code> not permitted).
       *
       * @see #removeAnnotation(CategoryAnnotation)
       */
      public void addAnnotation(CategoryAnnotation annotation) {
          addAnnotation(annotation, true);
      }
  
      /**
       * Adds an annotation to the plot and, if requested, sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @param annotation  the annotation (<code>null</code> not permitted).
       * @param notify  notify listeners?
       *
       * @since 1.0.10
       */
      public void addAnnotation(CategoryAnnotation annotation, boolean notify) {
          if (annotation == null) {
              throw new IllegalArgumentException("Null 'annotation' argument.");
          }
          this.annotations.add(annotation);
          annotation.addChangeListener(this);
          if (notify) {
              fireChangeEvent();
          }
      }
  
      /**
       * Removes an annotation from the plot and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param annotation  the annotation (<code>null</code> not permitted).
       *
       * @return A boolean (indicates whether or not the annotation was removed).
       *
       * @see #addAnnotation(CategoryAnnotation)
       */
      public boolean removeAnnotation(CategoryAnnotation annotation) {
          return removeAnnotation(annotation, true);
      }
  
      /**
       * Removes an annotation from the plot and, if requested, sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @param annotation  the annotation (<code>null</code> not permitted).
       * @param notify  notify listeners?
       *
       * @return A boolean (indicates whether or not the annotation was removed).
       *
       * @since 1.0.10
       */
      public boolean removeAnnotation(CategoryAnnotation annotation,
              boolean notify) {
          if (annotation == null) {
              throw new IllegalArgumentException("Null 'annotation' argument.");
          }
          boolean removed = this.annotations.remove(annotation);
          annotation.removeChangeListener(this);
          if (removed && notify) {
              fireChangeEvent();
          }
          return removed;
      }
  
      /**
       * Clears all the annotations and sends a {@link PlotChangeEvent} to all
       * registered listeners.
       */
      public void clearAnnotations() {
          for (CategoryAnnotation annotation : this.annotations) {
              annotation.removeChangeListener(this);
          }
          this.annotations.clear();
          fireChangeEvent();
      }
  
      /**
       * Returns the shadow generator for the plot, if any.
       *
       * @return The shadow generator (possibly <code>null</code>).
       *
       * @since 1.0.14
       */
      public ShadowGenerator getShadowGenerator() {
          return this.shadowGenerator;
      }
  
      /**
       * Sets the shadow generator for the plot and sends a
       * {@link PlotChangeEvent} to all registered listeners.
       *
       * @param generator  the generator (<code>null</code> permitted).
       *
       * @since 1.0.14
       */
      public void setShadowGenerator(ShadowGenerator generator) {
          this.shadowGenerator = generator;
          fireChangeEvent();
      }
  
      /**
       * Calculates the space required for the domain axis/axes.
       *
       * @param g2  the graphics device.
       * @param plotArea  the plot area.
       * @param space  a carrier for the result (<code>null</code> permitted).
       *
       * @return The required space.
       */
      protected AxisSpace calculateDomainAxisSpace(Graphics2D g2,
                                                   Rectangle2D plotArea,
                                                   AxisSpace space) {
  
          if (space == null) {
              space = new AxisSpace();
          }
  
          // reserve some space for the domain axis...
          if (this.fixedDomainAxisSpace != null) {
              if (this.orientation == PlotOrientation.HORIZONTAL) {
                  space.ensureAtLeast(
                      this.fixedDomainAxisSpace.getLeft(), RectangleEdge.LEFT);
                  space.ensureAtLeast(this.fixedDomainAxisSpace.getRight(),
                          RectangleEdge.RIGHT);
              }
              else if (this.orientation == PlotOrientation.VERTICAL) {
                  space.ensureAtLeast(this.fixedDomainAxisSpace.getTop(),
                          RectangleEdge.TOP);
                  space.ensureAtLeast(this.fixedDomainAxisSpace.getBottom(),
                          RectangleEdge.BOTTOM);
              }
          }
          else {
              // reserve space for the primary domain axis...
              RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
                      getDomainAxisLocation(), this.orientation);
              if (this.drawSharedDomainAxis) {
                  space = getDomainAxis().reserveSpace(g2, this, plotArea,
                          domainEdge, space);
              }
  
              // reserve space for any domain axes...
              for (int i = 0; i < this.domainAxes.size(); i++) {
                  Axis xAxis = this.domainAxes.get(i);
                  if (xAxis != null) {
                      RectangleEdge edge = getDomainAxisEdge(i);
                      space = xAxis.reserveSpace(g2, this, plotArea, edge, space);
                  }
              }
          }
  
          return space;
  
      }
  
      /**
       * Calculates the space required for the range axis/axes.
       *
       * @param g2  the graphics device.
       * @param plotArea  the plot area.
       * @param space  a carrier for the result (<code>null</code> permitted).
       *
       * @return The required space.
       */
      protected AxisSpace calculateRangeAxisSpace(Graphics2D g2,
                                                  Rectangle2D plotArea,
                                                  AxisSpace space) {
  
          if (space == null) {
              space = new AxisSpace();
          }
  
          // reserve some space for the range axis...
          if (this.fixedRangeAxisSpace != null) {
              if (this.orientation == PlotOrientation.HORIZONTAL) {
                  space.ensureAtLeast(this.fixedRangeAxisSpace.getTop(),
                          RectangleEdge.TOP);
                  space.ensureAtLeast(this.fixedRangeAxisSpace.getBottom(),
                          RectangleEdge.BOTTOM);
              }
              else if (this.orientation == PlotOrientation.VERTICAL) {
                  space.ensureAtLeast(this.fixedRangeAxisSpace.getLeft(),
                          RectangleEdge.LEFT);
                  space.ensureAtLeast(this.fixedRangeAxisSpace.getRight(),
                          RectangleEdge.RIGHT);
              }
          }
          else {
              // reserve space for the range axes (if any)...
              for (int i = 0; i < this.rangeAxes.size(); i++) {
                  Axis yAxis = this.rangeAxes.get(i);
                  if (yAxis != null) {
                      RectangleEdge edge = getRangeAxisEdge(i);
                      space = yAxis.reserveSpace(g2, this, plotArea, edge, space);
                  }
              }
          }
          return space;
  
      }
  
      /**
       * Trims a rectangle to integer coordinates.
       *
       * @param rect  the incoming rectangle.
       *
       * @return A rectangle with integer coordinates.
       */
      private Rectangle integerise(Rectangle2D rect) {
          int x0 = (int) Math.ceil(rect.getMinX());
          int y0 = (int) Math.ceil(rect.getMinY());
          int x1 = (int) Math.floor(rect.getMaxX());
          int y1 = (int) Math.floor(rect.getMaxY());
          return new Rectangle(x0, y0, (x1 - x0), (y1 - y0));
      }
  
      /**
       * Calculates the space required for the axes.
       *
       * @param g2  the graphics device.
       * @param plotArea  the plot area.
       *
       * @return The space required for the axes.
       */
      protected AxisSpace calculateAxisSpace(Graphics2D g2,
                                             Rectangle2D plotArea) {
          AxisSpace space = new AxisSpace();
          space = calculateRangeAxisSpace(g2, plotArea, space);
          space = calculateDomainAxisSpace(g2, plotArea, space);
          return space;
      }
  
      /**
       * Draws the plot on a Java 2D graphics device (such as the screen or a
       * printer).
       * <P>
       * At your option, you may supply an instance of {@link PlotRenderingInfo}.
       * If you do, it will be populated with information about the drawing,
       * including various plot dimensions and tooltip info.
       *
       * @param g2  the graphics device.
       * @param area  the area within which the plot (including axes) should
       *              be drawn.
       * @param anchor  the anchor point (<code>null</code> permitted).
       * @param parentState  the state from the parent plot, if there is one.
       * @param state  collects info as the chart is drawn (possibly
       *               <code>null</code>).
       */
      @Override
      public void draw(Graphics2D g2, Rectangle2D area, Point2D anchor,
              PlotState parentState, PlotRenderingInfo state) {
  
          // if the plot area is too small, just return...
          boolean b1 = (area.getWidth() <= MINIMUM_WIDTH_TO_DRAW);
          boolean b2 = (area.getHeight() <= MINIMUM_HEIGHT_TO_DRAW);
          if (b1 || b2) {
              return;
          }
  
          // record the plot area...
          if (state == null) {
              // if the incoming state is null, no information will be passed
              // back to the caller - but we create a temporary state to record
              // the plot area, since that is used later by the axes
              state = new PlotRenderingInfo(null);
          }
          state.setPlotArea(area);
  
          // adjust the drawing area for the plot insets (if any)...
          RectangleInsets insets = getInsets();
          insets.trim(area);
  
          // calculate the data area...
          AxisSpace space = calculateAxisSpace(g2, area);
          Rectangle2D dataArea = space.shrink(area, null);
          this.axisOffset.trim(dataArea);
          dataArea = integerise(dataArea);
          if (dataArea.isEmpty()) {
              return;
          }
          state.setDataArea(dataArea);
          createAndAddEntity((Rectangle2D) dataArea.clone(), state, null, null);
  
          // if there is a renderer, it draws the background, otherwise use the
          // default background...
          if (getRenderer() != null) {
              getRenderer().drawBackground(g2, this, dataArea);
          }
          else {
              drawBackground(g2, dataArea);
          }
  
          Map<Axis, AxisState> axisStateMap = drawAxes(g2, area, dataArea, state);
  
          // the anchor point is typically the point where the mouse last
          // clicked - the crosshairs will be driven off this point...
          if (anchor != null && !dataArea.contains(anchor)) {
              anchor = ShapeUtilities.getPointInRectangle(anchor.getX(),
                      anchor.getY(), dataArea);
          }
          CategoryCrosshairState crosshairState = new CategoryCrosshairState();
          crosshairState.setCrosshairDistance(Double.POSITIVE_INFINITY);
          crosshairState.setAnchor(anchor);
  
          // specify the anchor X and Y coordinates in Java2D space, for the
          // cases where these are not updated during rendering (i.e. no lock
          // on data)
          crosshairState.setAnchorX(Double.NaN);
          crosshairState.setAnchorY(Double.NaN);
          if (anchor != null) {
              ValueAxis rangeAxis = getRangeAxis();
              if (rangeAxis != null) {
                  double y;
                  if (getOrientation() == PlotOrientation.VERTICAL) {
                      y = rangeAxis.java2DToValue(anchor.getY(), dataArea,
                              getRangeAxisEdge());
                  }
                  else {
                      y = rangeAxis.java2DToValue(anchor.getX(), dataArea,
                              getRangeAxisEdge());
                  }
                  crosshairState.setAnchorY(y);
              }
          }
          crosshairState.setRowKey(getDomainCrosshairRowKey());
          crosshairState.setColumnKey(getDomainCrosshairColumnKey());
          crosshairState.setCrosshairY(getRangeCrosshairValue());
  
          // don't let anyone draw outside the data area
          Shape savedClip = g2.getClip();
          g2.clip(dataArea);
  
          drawDomainGridlines(g2, dataArea);
  
          AxisState rangeAxisState = axisStateMap.get(getRangeAxis());
          if (rangeAxisState == null) {
              if (parentState != null) {
                  rangeAxisState = parentState.getSharedAxisStates()
                          .get(getRangeAxis());
              }
          }
          if (rangeAxisState != null) {
              drawRangeGridlines(g2, dataArea, rangeAxisState.getTicks());
              drawZeroRangeBaseline(g2, dataArea);
          }
  
          Graphics2D savedG2 = g2;
          BufferedImage dataImage = null;
          if (this.shadowGenerator != null) {
              dataImage = new BufferedImage((int) dataArea.getWidth(),
                      (int)dataArea.getHeight(), BufferedImage.TYPE_INT_ARGB);
              g2 = dataImage.createGraphics();
              g2.translate(-dataArea.getX(), -dataArea.getY());
              g2.setRenderingHints(savedG2.getRenderingHints());
          }
  
          // draw the markers...
          for (int i = 0; i < this.renderers.size(); i++) {
              drawDomainMarkers(g2, dataArea, i, Layer.BACKGROUND);
          }
          for (int i = 0; i < this.renderers.size(); i++) {
              drawRangeMarkers(g2, dataArea, i, Layer.BACKGROUND);
          }
  
          // now render data items...
          boolean foundData = false;
  
          // set up the alpha-transparency...
          Composite originalComposite = g2.getComposite();
          g2.setComposite(AlphaComposite.getInstance(
                  AlphaComposite.SRC_OVER, getForegroundAlpha()));
  
          DatasetRenderingOrder order = getDatasetRenderingOrder();
          if (order == DatasetRenderingOrder.FORWARD) {
              for (int i = 0; i < this.datasets.size(); i++) {
                  foundData = render(g2, dataArea, i, state, crosshairState)
                      || foundData;
              }
          }
          else {  // DatasetRenderingOrder.REVERSE
              for (int i = this.datasets.size() - 1; i >= 0; i--) {
                  foundData = render(g2, dataArea, i, state, crosshairState)
                      || foundData;
              }
          }
          // draw the foreground markers...
          for (int i = 0; i < this.renderers.size(); i++) {
              drawDomainMarkers(g2, dataArea, i, Layer.FOREGROUND);
          }
          for (int i = 0; i < this.renderers.size(); i++) {
              drawRangeMarkers(g2, dataArea, i, Layer.FOREGROUND);
          }
  
          // draw the annotations (if any)...
          drawAnnotations(g2, dataArea);
  
          if (this.shadowGenerator != null) {
              BufferedImage shadowImage = this.shadowGenerator.createDropShadow(
                      dataImage);
              g2 = savedG2;
              g2.drawImage(shadowImage, (int) dataArea.getX()
                      + this.shadowGenerator.calculateOffsetX(),
                      (int) dataArea.getY()
                      + this.shadowGenerator.calculateOffsetY(), null);
              g2.drawImage(dataImage, (int) dataArea.getX(),
                      (int) dataArea.getY(), null);
          }
          g2.setClip(savedClip);
          g2.setComposite(originalComposite);
  
          if (!foundData) {
              drawNoDataMessage(g2, dataArea);
          }
  
          int datasetIndex = crosshairState.getDatasetIndex();
          setCrosshairDatasetIndex(datasetIndex, false);
  
          // draw domain crosshair if required...
          Comparable rowKey = crosshairState.getRowKey();
          Comparable columnKey = crosshairState.getColumnKey();
          setDomainCrosshairRowKey(rowKey, false);
          setDomainCrosshairColumnKey(columnKey, false);
          if (isDomainCrosshairVisible() && columnKey != null) {
              Paint paint = getDomainCrosshairPaint();
              Stroke stroke = getDomainCrosshairStroke();
              drawDomainCrosshair(g2, dataArea, this.orientation,
                      datasetIndex, rowKey, columnKey, stroke, paint);
          }
  
          // draw range crosshair if required...
          ValueAxis yAxis = getRangeAxisForDataset(datasetIndex);
          RectangleEdge yAxisEdge = getRangeAxisEdge();
          if (!this.rangeCrosshairLockedOnData && anchor != null) {
              double yy;
              if (getOrientation() == PlotOrientation.VERTICAL) {
                  yy = yAxis.java2DToValue(anchor.getY(), dataArea, yAxisEdge);
              }
              else {
                  yy = yAxis.java2DToValue(anchor.getX(), dataArea, yAxisEdge);
              }
              crosshairState.setCrosshairY(yy);
          }
          setRangeCrosshairValue(crosshairState.getCrosshairY(), false);
          if (isRangeCrosshairVisible()) {
              double y = getRangeCrosshairValue();
              Paint paint = getRangeCrosshairPaint();
              Stroke stroke = getRangeCrosshairStroke();
              drawRangeCrosshair(g2, dataArea, getOrientation(), y, yAxis,
                      stroke, paint);
          }
  
          // draw an outline around the plot area...
          if (isOutlineVisible()) {
              if (getRenderer() != null) {
                  getRenderer().drawOutline(g2, this, dataArea);
              }
              else {
                  drawOutline(g2, dataArea);
              }
          }
  
      }
  
      /**
       * Draws the plot background (the background color and/or image).
       * <P>
       * This method will be called during the chart drawing process and is
       * declared public so that it can be accessed by the renderers used by
       * certain subclasses.  You shouldn't need to call this method directly.
       *
       * @param g2  the graphics device.
       * @param area  the area within which the plot should be drawn.
       */
      @Override
      public void drawBackground(Graphics2D g2, Rectangle2D area) {
          fillBackground(g2, area, this.orientation);
          drawBackgroundImage(g2, area);
      }
  
      /**
       * A utility method for drawing the plot's axes.
       *
       * @param g2  the graphics device.
       * @param plotArea  the plot area.
       * @param dataArea  the data area.
       * @param plotState  collects information about the plot (<code>null</code>
       *                   permitted).
       *
       * @return A map containing the axis states.
       */
      protected Map<Axis, AxisState> drawAxes(Graphics2D g2,
                             Rectangle2D plotArea,
                             Rectangle2D dataArea,
                             PlotRenderingInfo plotState) {
  
          AxisCollection axisCollection = new AxisCollection();
  
          // add domain axes to lists...
          for (int index = 0; index < this.domainAxes.size(); index++) {
              CategoryAxis xAxis = this.domainAxes.get(index);
              if (xAxis != null) {
                  axisCollection.add(xAxis, getDomainAxisEdge(index));
              }
          }
  
          // add range axes to lists...
          for (int index = 0; index < this.rangeAxes.size(); index++) {
              ValueAxis yAxis = this.rangeAxes.get(index);
              if (yAxis != null) {
                  axisCollection.add(yAxis, getRangeAxisEdge(index));
              }
          }
  
          Map<Axis, AxisState> axisStateMap = new HashMap<Axis, AxisState>();
  
          // draw the top axes
          double cursor = dataArea.getMinY() - this.axisOffset.calculateTopOutset(
                  dataArea.getHeight());
          for (Axis axis : axisCollection.getAxesAtTop()) {
              if (axis != null) {
                  AxisState axisState = axis.draw(g2, cursor, plotArea, dataArea,
                          RectangleEdge.TOP, plotState);
                  cursor = axisState.getCursor();
                  axisStateMap.put(axis, axisState);
              }
          }
  
          // draw the bottom axes
          cursor = dataArea.getMaxY()
                   + this.axisOffset.calculateBottomOutset(dataArea.getHeight());
          for (Axis axis : axisCollection.getAxesAtBottom()) {
              if (axis != null) {
                  AxisState axisState = axis.draw(g2, cursor, plotArea, dataArea,
                          RectangleEdge.BOTTOM, plotState);
                  cursor = axisState.getCursor();
                  axisStateMap.put(axis, axisState);
              }
          }
  
          // draw the left axes
          cursor = dataArea.getMinX()
                   - this.axisOffset.calculateLeftOutset(dataArea.getWidth());
          for (Axis axis : axisCollection.getAxesAtLeft()) {
              if (axis != null) {
                  AxisState axisState = axis.draw(g2, cursor, plotArea, dataArea,
                          RectangleEdge.LEFT, plotState);
                  cursor = axisState.getCursor();
                  axisStateMap.put(axis, axisState);
              }
          }
  
          // draw the right axes
          cursor = dataArea.getMaxX()
                   + this.axisOffset.calculateRightOutset(dataArea.getWidth());
          for (Axis axis : axisCollection.getAxesAtRight()) {
              if (axis != null) {
                  AxisState axisState = axis.draw(g2, cursor, plotArea, dataArea,
                          RectangleEdge.RIGHT, plotState);
                  cursor = axisState.getCursor();
                  axisStateMap.put(axis, axisState);
              }
          }
  
          return axisStateMap;
  
      }
  
      /**
       * Draws a representation of a dataset within the dataArea region using the
       * appropriate renderer.
       *
       * @param g2  the graphics device.
       * @param dataArea  the region in which the data is to be drawn.
       * @param index  the dataset and renderer index.
       * @param info  an optional object for collection dimension information.
       * @param crosshairState  a state object for tracking crosshair info
       *        (<code>null</code> permitted).
       *
       * @return A boolean that indicates whether or not real data was found.
       *
       * @since 1.0.11
       */
      public boolean render(Graphics2D g2, Rectangle2D dataArea, int index,
              PlotRenderingInfo info, CategoryCrosshairState crosshairState) {
  
          boolean foundData = false;
          CategoryDataset currentDataset = getDataset(index);
          CategoryItemRenderer renderer = getRenderer(index);
          CategoryAxis domainAxis = getDomainAxisForDataset(index);
          ValueAxis rangeAxis = getRangeAxisForDataset(index);
          boolean hasData = !DatasetUtilities.isEmptyOrNull(currentDataset);
          if (hasData && renderer != null) {
  
              foundData = true;
              CategoryItemRendererState state = renderer.initialise(g2, dataArea,
                      this, index, info);
              state.setCrosshairState(crosshairState);
              int columnCount = currentDataset.getColumnCount();
              int rowCount = currentDataset.getRowCount();
              int passCount = renderer.getPassCount();
              for (int pass = 0; pass < passCount; pass++) {
                  if (this.columnRenderingOrder == SortOrder.ASCENDING) {
                      for (int column = 0; column < columnCount; column++) {
                          if (this.rowRenderingOrder == SortOrder.ASCENDING) {
                              for (int row = 0; row < rowCount; row++) {
                                  renderer.drawItem(g2, state, dataArea, this,
                                          domainAxis, rangeAxis, currentDataset,
                                          row, column, pass);
                              }
                          }
                          else {
                              for (int row = rowCount - 1; row >= 0; row--) {
                                  renderer.drawItem(g2, state, dataArea, this,
                                          domainAxis, rangeAxis, currentDataset,
                                          row, column, pass);
                              }
                          }
                      }
                  }
                  else {
                      for (int column = columnCount - 1; column >= 0; column--) {
                          if (this.rowRenderingOrder == SortOrder.ASCENDING) {
                              for (int row = 0; row < rowCount; row++) {
                                  renderer.drawItem(g2, state, dataArea, this,
                                          domainAxis, rangeAxis, currentDataset,
                                          row, column, pass);
                              }
                          }
                          else {
                              for (int row = rowCount - 1; row >= 0; row--) {
                                  renderer.drawItem(g2, state, dataArea, this,
                                          domainAxis, rangeAxis, currentDataset,
                                          row, column, pass);
                              }
                          }
                      }
                  }
              }
          }
          return foundData;
  
      }
  
      /**
       * Draws the domain gridlines for the plot, if they are visible.
       *
       * @param g2  the graphics device.
       * @param dataArea  the area inside the axes.
       *
       * @see #drawRangeGridlines(Graphics2D, Rectangle2D, List)
       */
      protected void drawDomainGridlines(Graphics2D g2, Rectangle2D dataArea) {
  
          if (!isDomainGridlinesVisible()) {
              return;
          }
          CategoryAnchor anchor = getDomainGridlinePosition();
          RectangleEdge domainAxisEdge = getDomainAxisEdge();
          CategoryDataset dataset = getDataset();
          if (dataset == null) {
              return;
          }
          CategoryAxis axis = getDomainAxis();
          if (axis != null) {
              int columnCount = dataset.getColumnCount();
              for (int c = 0; c < columnCount; c++) {
                  double xx = axis.getCategoryJava2DCoordinate(anchor, c,
                          columnCount, dataArea, domainAxisEdge);
                  CategoryItemRenderer renderer1 = getRenderer();
                  if (renderer1 != null) {
                      renderer1.drawDomainGridline(g2, this, dataArea, xx);
                  }
              }
          }
      }
  
      /**
       * Draws the range gridlines for the plot, if they are visible.
       *
       * @param g2  the graphics device.
       * @param dataArea  the area inside the axes.
       * @param ticks  the ticks.
       *
       * @see #drawDomainGridlines(Graphics2D, Rectangle2D)
       */
      protected void drawRangeGridlines(Graphics2D g2, Rectangle2D dataArea,
                                        List<ValueTick> ticks) {
          // draw the range grid lines, if any...
          if (!isRangeGridlinesVisible() && !isRangeMinorGridlinesVisible()) {
              return;
          }
          // no axis, no gridlines...
          ValueAxis axis = getRangeAxis();
          if (axis == null) {
              return;
          }
          // no renderer, no gridlines...
          CategoryItemRenderer r = getRenderer();
          if (r == null) {
              return;
          }
  
          Stroke gridStroke = null;
          Paint gridPaint = null;
          boolean paintLine;
          for (ValueTick tick : ticks) {
              paintLine = false;
              if ((tick.getTickType() == TickType.MINOR)
                      && isRangeMinorGridlinesVisible()) {
                  gridStroke = getRangeMinorGridlineStroke();
                  gridPaint = getRangeMinorGridlinePaint();
                  paintLine = true;
              } else if ((tick.getTickType() == TickType.MAJOR)
                      && isRangeGridlinesVisible()) {
                  gridStroke = getRangeGridlineStroke();
                  gridPaint = getRangeGridlinePaint();
                  paintLine = true;
              }
              if (((tick.getValue() != 0.0)
                      || !isRangeZeroBaselineVisible()) && paintLine) {
                  // the method we want isn't in the CategoryItemRenderer
                  // interface...
                  if (r instanceof AbstractCategoryItemRenderer) {
                      AbstractCategoryItemRenderer aci
                              = (AbstractCategoryItemRenderer) r;
                      aci.drawRangeGridline(g2, this, axis, dataArea,
                              tick.getValue(), gridPaint, gridStroke);
                  } else {
                      // we'll have to use the method in the interface, but
                      // this doesn't have the paint and stroke settings...
                      r.drawRangeGridline(g2, this, axis, dataArea,
                              tick.getValue());
                  }
              }
          }
      }
  
      /**
       * Draws a base line across the chart at value zero on the range axis.
       *
       * @param g2  the graphics device.
       * @param area  the data area.
       *
       * @see #setRangeZeroBaselineVisible(boolean)
       *
       * @since 1.0.13
       */
      protected void drawZeroRangeBaseline(Graphics2D g2, Rectangle2D area) {
          if (!isRangeZeroBaselineVisible()) {
              return;
          }
          CategoryItemRenderer r = getRenderer();
          if (r instanceof AbstractCategoryItemRenderer) {
              AbstractCategoryItemRenderer aci = (AbstractCategoryItemRenderer) r;
              aci.drawRangeGridline(g2, this, getRangeAxis(), area, 0.0,
                      this.rangeZeroBaselinePaint, this.rangeZeroBaselineStroke);
          }
          else {
              r.drawRangeGridline(g2, this, getRangeAxis(), area, 0.0);
          }
      }
  
      /**
       * Draws the annotations.
       *
       * @param g2  the graphics device.
       * @param dataArea  the data area.
       */
      protected void drawAnnotations(Graphics2D g2, Rectangle2D dataArea) {
  
          if (getAnnotations() != null) {
              for (CategoryAnnotation annotation : getAnnotations()) {
                  annotation.draw(g2, this, dataArea, getDomainAxis(),
                          getRangeAxis());
              }
          }
  
      }
  
      /**
       * Draws the domain markers (if any) for an axis and layer.  This method is
       * typically called from within the draw() method.
       *
       * @param g2  the graphics device.
       * @param dataArea  the data area.
       * @param index  the renderer index.
       * @param layer  the layer (foreground or background).
       *
       * @see #drawRangeMarkers(Graphics2D, Rectangle2D, int, Layer)
       */
      protected void drawDomainMarkers(Graphics2D g2, Rectangle2D dataArea,
                                       int index, Layer layer) {
  
          CategoryItemRenderer r = getRenderer(index);
          if (r == null) {
              return;
          }
  
          Collection<Marker> markers = getDomainMarkers(index, layer);
          CategoryAxis axis = getDomainAxisForDataset(index);
          if (markers != null && axis != null) {
              for (Marker marker1 : markers) {
                  CategoryMarker marker = (CategoryMarker) marker1;
                  r.drawDomainMarker(g2, this, axis, marker, dataArea);
              }
          }
  
      }
  
      /**
       * Draws the range markers (if any) for an axis and layer.  This method is
       * typically called from within the draw() method.
       *
       * @param g2  the graphics device.
       * @param dataArea  the data area.
       * @param index  the renderer index.
       * @param layer  the layer (foreground or background).
       *
       * @see #drawDomainMarkers(Graphics2D, Rectangle2D, int, Layer)
       */
      protected void drawRangeMarkers(Graphics2D g2, Rectangle2D dataArea,
                                      int index, Layer layer) {
  
          CategoryItemRenderer r = getRenderer(index);
          if (r == null) {
              return;
          }
  
          Collection<Marker> markers = getRangeMarkers(index, layer);
          ValueAxis axis = getRangeAxisForDataset(index);
          if (markers != null && axis != null) {
              for (Marker marker : markers) {
                  r.drawRangeMarker(g2, this, axis, marker, dataArea);
              }
          }
  
      }
  
      /**
       * Utility method for drawing a line perpendicular to the range axis (used
       * for crosshairs).
       *
       * @param g2  the graphics device.
       * @param dataArea  the area defined by the axes.
       * @param value  the data value.
       * @param stroke  the line stroke (<code>null</code> not permitted).
       * @param paint  the line paint (<code>null</code> not permitted).
       */
      protected void drawRangeLine(Graphics2D g2, Rectangle2D dataArea,
              double value, Stroke stroke, Paint paint) {
  
          double java2D = getRangeAxis().valueToJava2D(value, dataArea,
                  getRangeAxisEdge());
          Line2D line = null;
          if (this.orientation == PlotOrientation.HORIZONTAL) {
              line = new Line2D.Double(java2D, dataArea.getMinY(), java2D,
                      dataArea.getMaxY());
          }
          else if (this.orientation == PlotOrientation.VERTICAL) {
              line = new Line2D.Double(dataArea.getMinX(), java2D,
                      dataArea.getMaxX(), java2D);
          }
          g2.setStroke(stroke);
          g2.setPaint(paint);
          g2.draw(line);
  
      }
  
      /**
       * Draws a domain crosshair.
       *
       * @param g2  the graphics target.
       * @param dataArea  the data area.
       * @param orientation  the plot orientation.
       * @param datasetIndex  the dataset index.
       * @param rowKey  the row key.
       * @param columnKey  the column key.
       * @param stroke  the stroke used to draw the crosshair line.
       * @param paint  the paint used to draw the crosshair line.
       *
       * @see #drawRangeCrosshair(Graphics2D, Rectangle2D, PlotOrientation,
       *     double, ValueAxis, Stroke, Paint)
       *
       * @since 1.0.11
       */
      protected void drawDomainCrosshair(Graphics2D g2, Rectangle2D dataArea,
              PlotOrientation orientation, int datasetIndex,
              Comparable rowKey, Comparable columnKey, Stroke stroke,
              Paint paint) {
  
          CategoryDataset dataset = getDataset(datasetIndex);
          CategoryAxis axis = getDomainAxisForDataset(datasetIndex);
          CategoryItemRenderer renderer = getRenderer(datasetIndex);
          Line2D line;
          if (orientation == PlotOrientation.VERTICAL) {
              double xx = renderer.getItemMiddle(rowKey, columnKey, dataset, axis,
                      dataArea, RectangleEdge.BOTTOM);
              line = new Line2D.Double(xx, dataArea.getMinY(), xx,
                      dataArea.getMaxY());
          }
          else {
              double yy = renderer.getItemMiddle(rowKey, columnKey, dataset, axis,
                      dataArea, RectangleEdge.LEFT);
              line = new Line2D.Double(dataArea.getMinX(), yy,
                      dataArea.getMaxX(), yy);
          }
          g2.setStroke(stroke);
          g2.setPaint(paint);
          g2.draw(line);
  
      }
  
      /**
       * Draws a range crosshair.
       *
       * @param g2  the graphics target.
       * @param dataArea  the data area.
       * @param orientation  the plot orientation.
       * @param value  the crosshair value.
       * @param axis  the axis against which the value is measured.
       * @param stroke  the stroke used to draw the crosshair line.
       * @param paint  the paint used to draw the crosshair line.
       *
       * @see #drawDomainCrosshair(Graphics2D, Rectangle2D, PlotOrientation, int,
       *      Comparable, Comparable, Stroke, Paint)
       *
       * @since 1.0.5
       */
      protected void drawRangeCrosshair(Graphics2D g2, Rectangle2D dataArea,
              PlotOrientation orientation, double value, ValueAxis axis,
              Stroke stroke, Paint paint) {
  
          if (!axis.getRange().contains(value)) {
              return;
          }
          Line2D line;
          if (orientation == PlotOrientation.HORIZONTAL) {
              double xx = axis.valueToJava2D(value, dataArea,
                      RectangleEdge.BOTTOM);
              line = new Line2D.Double(xx, dataArea.getMinY(), xx,
                      dataArea.getMaxY());
          }
          else {
              double yy = axis.valueToJava2D(value, dataArea,
                      RectangleEdge.LEFT);
              line = new Line2D.Double(dataArea.getMinX(), yy,
                      dataArea.getMaxX(), yy);
          }
          g2.setStroke(stroke);
          g2.setPaint(paint);
          g2.draw(line);
  
      }
  
      /**
       * Returns the range of data values that will be plotted against the range
       * axis.  If the dataset is <code>null</code>, this method returns
       * <code>null</code>.
       *
       * @param axis  the axis.
       *
       * @return The data range.
       */
      @Override
      public Range getDataRange(ValueAxis axis) {
  
          Range result = null;
          List<CategoryDataset> mappedDatasets = new ArrayList<CategoryDataset>();
  
          int rangeIndex = this.rangeAxes.indexOf(axis);
          if (rangeIndex >= 0) {
              mappedDatasets.addAll(datasetsMappedToRangeAxis(rangeIndex));
          }
          else if (axis == getRangeAxis()) {
              mappedDatasets.addAll(datasetsMappedToRangeAxis(0));
          }
  
          // iterate through the datasets that map to the axis and get the union
          // of the ranges.
          for (CategoryDataset d : mappedDatasets) {
              CategoryItemRenderer r = getRendererForDataset(d);
              if (r != null) {
                  result = Range.combine(result, r.findRangeBounds(d));
              }
          }
          return result;
  
      }
  
      /**
       * Returns a list of the datasets that are mapped to the axis with the
       * specified index.
       *
       * @param axisIndex  the axis index.
       *
       * @return The list (possibly empty, but never <code>null</code>).
       *
       * @since 1.0.3
       */
      private List<CategoryDataset> datasetsMappedToDomainAxis(int axisIndex) {
          Integer key = axisIndex;
          List<CategoryDataset> result = new ArrayList<CategoryDataset>();
          for (int i = 0; i < this.datasets.size(); i++) {
              List<Integer> mappedAxes = this.datasetToDomainAxesMap.get(
                      Integer.valueOf(i));
              CategoryDataset dataset = this.datasets.get(i);
              if (mappedAxes == null) {
                  if (key.equals(ZERO)) {
                      if (dataset != null) {
                          result.add(dataset);
                      }
                  }
              }
              else {
                  if (mappedAxes.contains(key)) {
                      if (dataset != null) {
                          result.add(dataset);
                      }
                  }
              }
          }
          return result;
      }
  
      /**
       * A utility method that returns a list of datasets that are mapped to a
       * given range axis.
       *
       * @param index  the axis index.
       *
       * @return A list of datasets.
       */
      private List<CategoryDataset> datasetsMappedToRangeAxis(int index) {
          Integer key = index;
          List<CategoryDataset> result = new ArrayList<CategoryDataset>();
          for (int i = 0; i < this.datasets.size(); i++) {
              List<Integer> mappedAxes = this.datasetToRangeAxesMap.get(
                      Integer.valueOf(i));
              if (mappedAxes == null) {
                  if (key.equals(ZERO)) {
                      result.add(this.datasets.get(i));
                  }
              }
              else {
                  if (mappedAxes.contains(key)) {
                      result.add(this.datasets.get(i));
                  }
              }
          }
          return result;
      }
  
      /**
       * Returns the weight for this plot when it is used as a subplot within a
       * combined plot.
       *
       * @return The weight.
       *
       * @see #setWeight(int)
       */
      public int getWeight() {
          return this.weight;
      }
  
      /**
       * Sets the weight for the plot and sends a {@link PlotChangeEvent} to all
       * registered listeners.
       *
       * @param weight  the weight.
       *
       * @see #getWeight()
       */
      public void setWeight(int weight) {
          this.weight = weight;
          fireChangeEvent();
      }
  
      /**
       * Returns the fixed domain axis space.
       *
       * @return The fixed domain axis space (possibly <code>null</code>).
       *
       * @see #setFixedDomainAxisSpace(AxisSpace)
       */
      public AxisSpace getFixedDomainAxisSpace() {
          return this.fixedDomainAxisSpace;
      }
  
      /**
       * Sets the fixed domain axis space and sends a {@link PlotChangeEvent} to
       * all registered listeners.
       *
       * @param space  the space (<code>null</code> permitted).
       *
       * @see #getFixedDomainAxisSpace()
       */
      public void setFixedDomainAxisSpace(AxisSpace space) {
          setFixedDomainAxisSpace(space, true);
      }
  
      /**
       * Sets the fixed domain axis space and sends a {@link PlotChangeEvent} to
       * all registered listeners.
       *
       * @param space  the space (<code>null</code> permitted).
       * @param notify  notify listeners?
       *
       * @see #getFixedDomainAxisSpace()
       *
       * @since 1.0.7
       */
      public void setFixedDomainAxisSpace(AxisSpace space, boolean notify) {
          this.fixedDomainAxisSpace = space;
          if (notify) {
              fireChangeEvent();
          }
      }
  
      /**
       * Returns the fixed range axis space.
       *
       * @return The fixed range axis space (possibly <code>null</code>).
       *
       * @see #setFixedRangeAxisSpace(AxisSpace)
       */
      public AxisSpace getFixedRangeAxisSpace() {
          return this.fixedRangeAxisSpace;
      }
  
      /**
       * Sets the fixed range axis space and sends a {@link PlotChangeEvent} to
       * all registered listeners.
       *
       * @param space  the space (<code>null</code> permitted).
       *
       * @see #getFixedRangeAxisSpace()
       */
      public void setFixedRangeAxisSpace(AxisSpace space) {
          setFixedRangeAxisSpace(space, true);
      }
  
      /**
       * Sets the fixed range axis space and sends a {@link PlotChangeEvent} to
       * all registered listeners.
       *
       * @param space  the space (<code>null</code> permitted).
       * @param notify  notify listeners?
       *
       * @see #getFixedRangeAxisSpace()
       *
       * @since 1.0.7
       */
      public void setFixedRangeAxisSpace(AxisSpace space, boolean notify) {
          this.fixedRangeAxisSpace = space;
          if (notify) {
              fireChangeEvent();
          }
      }
  
      /**
       * Returns a list of the categories in the plot's primary dataset.
       *
       * @return A list of the categories in the plot's primary dataset.
       *
       * @see #getCategoriesForAxis(CategoryAxis)
       */
      public List<Comparable> getCategories() {
          List<Comparable> result = null;
          if (getDataset() != null) {
              result = Collections.unmodifiableList(getDataset().getColumnKeys());
          }
          return result;
      }
  
      /**
       * Returns a list of the categories that should be displayed for the
       * specified axis.
       *
       * @param axis  the axis (<code>null</code> not permitted)
       *
       * @return The categories.
       *
       * @since 1.0.3
       */
      public List<Comparable> getCategoriesForAxis(CategoryAxis axis) {
          List<Comparable> result = new ArrayList<Comparable>();
          int axisIndex = this.domainAxes.indexOf(axis);
          List<CategoryDataset> mappedDatasets = datasetsMappedToDomainAxis(axisIndex);
          for (CategoryDataset dataset : mappedDatasets) {
              // add the unique categories from this dataset
              for (int i = 0; i < dataset.getColumnCount(); i++) {
                  Comparable category = dataset.getColumnKey(i);
                  if (!result.contains(category)) {
                      result.add(category);
                  }
              }
          }
          return result;
      }
  
      /**
       * Returns the flag that controls whether or not the shared domain axis is
       * drawn for each subplot.
       *
       * @return A boolean.
       *
       * @see #setDrawSharedDomainAxis(boolean)
       */
      public boolean getDrawSharedDomainAxis() {
          return this.drawSharedDomainAxis;
      }
  
      /**
       * Sets the flag that controls whether the shared domain axis is drawn when
       * this plot is being used as a subplot.
       *
       * @param draw  a boolean.
       *
       * @see #getDrawSharedDomainAxis()
       */
      public void setDrawSharedDomainAxis(boolean draw) {
          this.drawSharedDomainAxis = draw;
          fireChangeEvent();
      }
  
      /**
       * Returns <code>false</code> always, because the plot cannot be panned
       * along the domain axis/axes.
       *
       * @return A boolean.
       *
       * @see #isRangePannable()
       *
       * @since 1.0.13
       */
      @Override
      public boolean isDomainPannable() {
          return false;
      }
  
      /**
       * Returns <code>true</code> if panning is enabled for the range axes,
       * and <code>false</code> otherwise.
       *
       * @return A boolean.
       *
       * @see #setRangePannable(boolean)
       * @see #isDomainPannable()
       *
       * @since 1.0.13
       */
      @Override
      public boolean isRangePannable() {
          return this.rangePannable;
      }
  
      /**
       * Sets the flag that enables or disables panning of the plot along
       * the range axes.
       *
       * @param pannable  the new flag value.
       *
       * @see #isRangePannable()
       *
       * @since 1.0.13
       */
      public void setRangePannable(boolean pannable) {
          this.rangePannable = pannable;
      }
  
      /**
       * Pans the domain axes by the specified percentage.
       *
       * @param percent  the distance to pan (as a percentage of the axis length).
       * @param info the plot info
       * @param source the source point where the pan action started.
       *
       * @since 1.0.13
       */
      @Override
      public void panDomainAxes(double percent, PlotRenderingInfo info,
              Point2D source) {
          // do nothing, because the plot is not pannable along the domain axes
      }
  
      /**
       * Pans the range axes by the specified percentage.
       *
       * @param percent  the distance to pan (as a percentage of the axis length).
       * @param info the plot info
       * @param source the source point where the pan action started.
       *
       * @since 1.0.13
       */
      @Override
      public void panRangeAxes(double percent, PlotRenderingInfo info,
              Point2D source) {
          if (!isRangePannable()) {
              return;
          }
          int rangeAxisCount = getRangeAxisCount();
          for (int i = 0; i < rangeAxisCount; i++) {
              ValueAxis axis = getRangeAxis(i);
              if (axis == null) {
                  continue;
              }
              double length = axis.getRange().getLength();
              double adj = percent * length;
              if (axis.isInverted()) {
                  adj = -adj;
              }
              axis.setRange(axis.getLowerBound() + adj,
                      axis.getUpperBound() + adj);
          }
      }
  
      /**
       * Returns <code>false</code> to indicate that the domain axes are not
       * zoomable.
       *
       * @return A boolean.
       *
       * @see #isRangeZoomable()
       */
      @Override
      public boolean isDomainZoomable() {
          return false;
      }
  
      /**
       * Returns <code>true</code> to indicate that the range axes are zoomable.
       *
       * @return A boolean.
       *
       * @see #isDomainZoomable()
       */
      @Override
      public boolean isRangeZoomable() {
          return true;
      }
  
      /**
       * This method does nothing, because <code>CategoryPlot</code> doesn't
       * support zooming on the domain.
       *
       * @param factor  the zoom factor.
       * @param state  the plot state.
       * @param source  the source point (in Java2D space) for the zoom.
       */
      @Override
      public void zoomDomainAxes(double factor, PlotRenderingInfo state,
                                 Point2D source) {
          // can't zoom domain axis
      }
  
      /**
       * This method does nothing, because <code>CategoryPlot</code> doesn't
       * support zooming on the domain.
       *
       * @param lowerPercent  the lower bound.
       * @param upperPercent  the upper bound.
       * @param state  the plot state.
       * @param source  the source point (in Java2D space) for the zoom.
       */
      @Override
      public void zoomDomainAxes(double lowerPercent, double upperPercent,
                                 PlotRenderingInfo state, Point2D source) {
          // can't zoom domain axis
      }
  
      /**
       * This method does nothing, because <code>CategoryPlot</code> doesn't
       * support zooming on the domain.
       *
       * @param factor  the zoom factor.
       * @param info  the plot rendering info.
       * @param source  the source point (in Java2D space).
       * @param useAnchor  use source point as zoom anchor?
       *
       * @see #zoomRangeAxes(double, PlotRenderingInfo, Point2D, boolean)
       *
       * @since 1.0.7
       */
      @Override
      public void zoomDomainAxes(double factor, PlotRenderingInfo info,
                                 Point2D source, boolean useAnchor) {
          // can't zoom domain axis
      }
  
      /**
       * Multiplies the range on the range axis/axes by the specified factor.
       *
       * @param factor  the zoom factor.
       * @param state  the plot state.
       * @param source  the source point (in Java2D space) for the zoom.
       */
      @Override
      public void zoomRangeAxes(double factor, PlotRenderingInfo state,
                                Point2D source) {
          // delegate to other method
          zoomRangeAxes(factor, state, source, false);
      }
  
      /**
       * Multiplies the range on the range axis/axes by the specified factor.
       *
       * @param factor  the zoom factor.
       * @param info  the plot rendering info.
       * @param source  the source point.
       * @param useAnchor  a flag that controls whether or not the source point
       *         is used for the zoom anchor.
       *
       * @see #zoomDomainAxes(double, PlotRenderingInfo, Point2D, boolean)
       *
       * @since 1.0.7
       */
      @Override
      public void zoomRangeAxes(double factor, PlotRenderingInfo info,
                                Point2D source, boolean useAnchor) {
  
          // perform the zoom on each range axis
          for (int i = 0; i < this.rangeAxes.size(); i++) {
              ValueAxis rangeAxis = this.rangeAxes.get(i);
              if (rangeAxis != null) {
                  if (useAnchor) {
                      // get the relevant source coordinate given the plot
                      // orientation
                      double sourceY = source.getY();
                      if (this.orientation == PlotOrientation.HORIZONTAL) {
                          sourceY = source.getX();
                      }
                      double anchorY = rangeAxis.java2DToValue(sourceY,
                              info.getDataArea(), getRangeAxisEdge());
                      rangeAxis.resizeRange2(factor, anchorY);
                  }
                  else {
                      rangeAxis.resizeRange(factor);
                  }
              }
          }
      }
  
      /**
       * Zooms in on the range axes.
       *
       * @param lowerPercent  the lower bound.
       * @param upperPercent  the upper bound.
       * @param state  the plot state.
       * @param source  the source point (in Java2D space) for the zoom.
       */
      @Override
      public void zoomRangeAxes(double lowerPercent, double upperPercent,
                                PlotRenderingInfo state, Point2D source) {
          for (int i = 0; i < this.rangeAxes.size(); i++) {
              ValueAxis rangeAxis = this.rangeAxes.get(i);
              if (rangeAxis != null) {
                  rangeAxis.zoomRange(lowerPercent, upperPercent);
              }
          }
      }
  
      /**
       * Returns the anchor value.
       *
       * @return The anchor value.
       *
       * @see #setAnchorValue(double)
       */
      public double getAnchorValue() {
          return this.anchorValue;
      }
  
      /**
       * Sets the anchor value and sends a {@link PlotChangeEvent} to all
       * registered listeners.
       *
       * @param value  the anchor value.
       *
       * @see #getAnchorValue()
       */
      public void setAnchorValue(double value) {
          setAnchorValue(value, true);
      }
  
      /**
       * Sets the anchor value and, if requested, sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param value  the value.
       * @param notify  notify listeners?
       *
       * @see #getAnchorValue()
       */
      public void setAnchorValue(double value, boolean notify) {
          this.anchorValue = value;
          if (notify) {
              fireChangeEvent();
          }
      }
  
      /**
       * Tests the plot for equality with an arbitrary object.
       *
       * @param obj  the object to test against (<code>null</code> permitted).
       *
       * @return A boolean.
       */
      @Override
      public boolean equals(Object obj) {
          if (obj == this) {
              return true;
          }
          if (!(obj instanceof CategoryPlot)) {
              return false;
          }
          CategoryPlot that = (CategoryPlot) obj;
          if (this.orientation != that.orientation) {
              return false;
          }
          if (!ObjectUtilities.equal(this.axisOffset, that.axisOffset)) {
              return false;
          }
          if (!this.domainAxes.equals(that.domainAxes)) {
              return false;
          }
          if (!this.domainAxisLocations.equals(that.domainAxisLocations)) {
              return false;
          }
          if (this.drawSharedDomainAxis != that.drawSharedDomainAxis) {
              return false;
          }
          if (!this.rangeAxes.equals(that.rangeAxes)) {
              return false;
          }
          if (!this.rangeAxisLocations.equals(that.rangeAxisLocations)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.datasetToDomainAxesMap,
                  that.datasetToDomainAxesMap)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.datasetToRangeAxesMap,
                  that.datasetToRangeAxesMap)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.renderers, that.renderers)) {
              return false;
          }
          if (this.renderingOrder != that.renderingOrder) {
              return false;
          }
          if (this.columnRenderingOrder != that.columnRenderingOrder) {
              return false;
          }
          if (this.rowRenderingOrder != that.rowRenderingOrder) {
              return false;
          }
          if (this.domainGridlinesVisible != that.domainGridlinesVisible) {
              return false;
          }
          if (this.domainGridlinePosition != that.domainGridlinePosition) {
              return false;
          }
          if (!ObjectUtilities.equal(this.domainGridlineStroke,
                  that.domainGridlineStroke)) {
              return false;
          }
          if (!PaintUtilities.equal(this.domainGridlinePaint,
                  that.domainGridlinePaint)) {
              return false;
          }
          if (this.rangeGridlinesVisible != that.rangeGridlinesVisible) {
              return false;
          }
          if (!ObjectUtilities.equal(this.rangeGridlineStroke,
                  that.rangeGridlineStroke)) {
              return false;
          }
          if (!PaintUtilities.equal(this.rangeGridlinePaint,
                  that.rangeGridlinePaint)) {
              return false;
          }
          if (this.anchorValue != that.anchorValue) {
              return false;
          }
          if (this.rangeCrosshairVisible != that.rangeCrosshairVisible) {
              return false;
          }
          if (this.rangeCrosshairValue != that.rangeCrosshairValue) {
              return false;
          }
          if (!ObjectUtilities.equal(this.rangeCrosshairStroke,
                  that.rangeCrosshairStroke)) {
              return false;
          }
          if (!PaintUtilities.equal(this.rangeCrosshairPaint,
                  that.rangeCrosshairPaint)) {
              return false;
          }
          if (this.rangeCrosshairLockedOnData
                  != that.rangeCrosshairLockedOnData) {
              return false;
          }
          if (!ObjectUtilities.equal(this.foregroundDomainMarkers,
                  that.foregroundDomainMarkers)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.backgroundDomainMarkers,
                  that.backgroundDomainMarkers)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.foregroundRangeMarkers,
                  that.foregroundRangeMarkers)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.backgroundRangeMarkers,
                  that.backgroundRangeMarkers)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.annotations, that.annotations)) {
              return false;
          }
          if (this.weight != that.weight) {
              return false;
          }
          if (!ObjectUtilities.equal(this.fixedDomainAxisSpace,
                  that.fixedDomainAxisSpace)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.fixedRangeAxisSpace,
                  that.fixedRangeAxisSpace)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.fixedLegendItems,
                  that.fixedLegendItems)) {
              return false;
          }
          if (this.domainCrosshairVisible != that.domainCrosshairVisible) {
              return false;
          }
          if (this.crosshairDatasetIndex != that.crosshairDatasetIndex) {
              return false;
          }
          if (!ObjectUtilities.equal(this.domainCrosshairColumnKey,
                  that.domainCrosshairColumnKey)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.domainCrosshairRowKey,
                  that.domainCrosshairRowKey)) {
              return false;
          }
          if (!PaintUtilities.equal(this.domainCrosshairPaint,
                  that.domainCrosshairPaint)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.domainCrosshairStroke,
                  that.domainCrosshairStroke)) {
              return false;
          }
          if (this.rangeMinorGridlinesVisible
                  != that.rangeMinorGridlinesVisible) {
              return false;
          }
          if (!PaintUtilities.equal(this.rangeMinorGridlinePaint,
                  that.rangeMinorGridlinePaint)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.rangeMinorGridlineStroke,
                  that.rangeMinorGridlineStroke)) {
              return false;
          }
          if (this.rangeZeroBaselineVisible != that.rangeZeroBaselineVisible) {
              return false;
          }
          if (!PaintUtilities.equal(this.rangeZeroBaselinePaint,
                  that.rangeZeroBaselinePaint)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.rangeZeroBaselineStroke,
                  that.rangeZeroBaselineStroke)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.shadowGenerator,
                  that.shadowGenerator)) {
              return false;
          }
          return super.equals(obj);
      }
  
      /**
       * Returns a clone of the plot.
       *
       * @return A clone.
       *
       * @throws CloneNotSupportedException  if the cloning is not supported.
       */
      @Override
      public Object clone() throws CloneNotSupportedException {
  
          CategoryPlot clone = (CategoryPlot) super.clone();
  
          clone.domainAxes = new ObjectList<CategoryAxis>();
          for (int i = 0; i < this.domainAxes.size(); i++) {
              CategoryAxis xAxis = this.domainAxes.get(i);
              if (xAxis != null) {
                  CategoryAxis clonedAxis = (CategoryAxis) xAxis.clone();
                  clone.setDomainAxis(i, clonedAxis);
              }
          }
          clone.domainAxisLocations
                  = (ObjectList<AxisLocation>) this.domainAxisLocations.clone();
  
          clone.rangeAxes = new ObjectList<ValueAxis>();
          for (int i = 0; i < this.rangeAxes.size(); i++) {
              ValueAxis yAxis = this.rangeAxes.get(i);
              if (yAxis != null) {
                  ValueAxis clonedAxis = (ValueAxis) yAxis.clone();
                  clone.setRangeAxis(i, clonedAxis);
              }
          }
          clone.rangeAxisLocations = (ObjectList<AxisLocation>) this.rangeAxisLocations.clone();
  
          clone.datasets = (ObjectList<CategoryDataset>) this.datasets.clone();
          for (int i = 0; i < clone.datasets.size(); i++) {
              CategoryDataset dataset = clone.getDataset(i);
              if (dataset != null) {
                  dataset.addChangeListener(clone);
              }
          }
          clone.datasetToDomainAxesMap = new TreeMap<Integer, List<Integer>>();
          clone.datasetToDomainAxesMap.putAll(this.datasetToDomainAxesMap);
          clone.datasetToRangeAxesMap = new TreeMap<Integer, List<Integer>>();
          clone.datasetToRangeAxesMap.putAll(this.datasetToRangeAxesMap);
  
          clone.renderers = (ObjectList<CategoryItemRenderer>) this.renderers.clone();
          for (int i = 0; i < this.renderers.size(); i++) {
              CategoryItemRenderer renderer2 = this.renderers.get(i);
              if (renderer2 instanceof PublicCloneable) {
                  PublicCloneable pc = (PublicCloneable) renderer2;
                  CategoryItemRenderer rc = (CategoryItemRenderer) pc.clone();
                  clone.renderers.set(i, rc);
                  rc.setPlot(clone);
                  rc.addChangeListener(clone);
              }
          }
          if (this.fixedDomainAxisSpace != null) {
              clone.fixedDomainAxisSpace = ObjectUtilities.clone(
                      this.fixedDomainAxisSpace);
          }
          if (this.fixedRangeAxisSpace != null) {
              clone.fixedRangeAxisSpace = ObjectUtilities.clone(
                      this.fixedRangeAxisSpace);
          }
  
          clone.annotations = ObjectUtilities.deepClone(this.annotations);
          clone.foregroundDomainMarkers = cloneMarkerMap(
                  this.foregroundDomainMarkers);
          clone.backgroundDomainMarkers = cloneMarkerMap(
                  this.backgroundDomainMarkers);
          clone.foregroundRangeMarkers = cloneMarkerMap(
                  this.foregroundRangeMarkers);
          clone.backgroundRangeMarkers = cloneMarkerMap(
                  this.backgroundRangeMarkers);
          if (this.fixedLegendItems != null) {
              clone.fixedLegendItems
                      = ObjectUtilities.deepClone(this.fixedLegendItems);
          }
          return clone;
  
      }
  
      /**
       * A utility method to clone the marker maps.
       *
       * @param map  the map to clone.
       *
       * @return A clone of the map.
       *
       * @throws CloneNotSupportedException if there is some problem cloning the
       *                                    map.
       */
      private Map<Integer, Collection<Marker>> cloneMarkerMap(Map<Integer, Collection<Marker>> map) throws CloneNotSupportedException {
          Map<Integer, Collection<Marker>> clone = new HashMap<Integer, Collection<Marker>>();
          Set<Integer> keys = map.keySet();
          for (Integer key : keys) {
              Collection<Marker> entry = map.get(key);
              Collection<Marker> toAdd = ObjectUtilities.<Marker, Collection<Marker>>deepClone(entry);
              clone.put(key, toAdd);
          }
          return clone;
      }
  
      /**
       * Provides serialization support.
       *
       * @param stream  the output stream.
       *
       * @throws IOException  if there is an I/O error.
       */
      private void writeObject(ObjectOutputStream stream) throws IOException {
          stream.defaultWriteObject();
          SerialUtilities.writeStroke(this.domainGridlineStroke, stream);
          SerialUtilities.writePaint(this.domainGridlinePaint, stream);
          SerialUtilities.writeStroke(this.rangeGridlineStroke, stream);
          SerialUtilities.writePaint(this.rangeGridlinePaint, stream);
          SerialUtilities.writeStroke(this.rangeCrosshairStroke, stream);
          SerialUtilities.writePaint(this.rangeCrosshairPaint, stream);
          SerialUtilities.writeStroke(this.domainCrosshairStroke, stream);
          SerialUtilities.writePaint(this.domainCrosshairPaint, stream);
          SerialUtilities.writeStroke(this.rangeMinorGridlineStroke, stream);
          SerialUtilities.writePaint(this.rangeMinorGridlinePaint, stream);
          SerialUtilities.writeStroke(this.rangeZeroBaselineStroke, stream);
          SerialUtilities.writePaint(this.rangeZeroBaselinePaint, stream);
      }
  
      /**
       * Provides serialization support.
       *
       * @param stream  the input stream.
       *
       * @throws IOException  if there is an I/O error.
       * @throws ClassNotFoundException  if there is a classpath problem.
       */
      private void readObject(ObjectInputStream stream)
          throws IOException, ClassNotFoundException {
  
          stream.defaultReadObject();
          this.domainGridlineStroke = SerialUtilities.readStroke(stream);
          this.domainGridlinePaint = SerialUtilities.readPaint(stream);
          this.rangeGridlineStroke = SerialUtilities.readStroke(stream);
          this.rangeGridlinePaint = SerialUtilities.readPaint(stream);
          this.rangeCrosshairStroke = SerialUtilities.readStroke(stream);
          this.rangeCrosshairPaint = SerialUtilities.readPaint(stream);
          this.domainCrosshairStroke = SerialUtilities.readStroke(stream);
          this.domainCrosshairPaint = SerialUtilities.readPaint(stream);
          this.rangeMinorGridlineStroke = SerialUtilities.readStroke(stream);
          this.rangeMinorGridlinePaint = SerialUtilities.readPaint(stream);
          this.rangeZeroBaselineStroke = SerialUtilities.readStroke(stream);
          this.rangeZeroBaselinePaint = SerialUtilities.readPaint(stream);
  
          for (int i = 0; i < this.domainAxes.size(); i++) {
              CategoryAxis xAxis = this.domainAxes.get(i);
              if (xAxis != null) {
                  xAxis.setPlot(this);
                  xAxis.addChangeListener(this);
              }
          }
          for (int i = 0; i < this.rangeAxes.size(); i++) {
              ValueAxis yAxis = this.rangeAxes.get(i);
              if (yAxis != null) {
                  yAxis.setPlot(this);
                  yAxis.addChangeListener(this);
              }
          }
          int datasetCount = this.datasets.size();
          for (int i = 0; i < datasetCount; i++) {
              Dataset dataset = this.datasets.get(i);
              if (dataset != null) {
                  dataset.addChangeListener(this);
              }
          }
          int rendererCount = this.renderers.size();
          for (int i = 0; i < rendererCount; i++) {
              CategoryItemRenderer renderer
                  = this.renderers.get(i);
              if (renderer != null) {
                  renderer.addChangeListener(this);
              }
          }
  
      }
  
  }
  